HP StorageWorks
Business Copy XP user guide
for the XP12000/XP10000/SVS200
Part number:
Fifth edition: March 2007
HP StorageWorks
Business Copy XP user guide
for the XP12000/XP10000/SVS200
Part number:
Fifth edition: March 2007
Legal and notice information
?? Copyright 1999, 2007
Con???dential computer software. Valid license from HP required for possession, use or copying. Consistent with FAR 12.211 and 12.212, Commercial Computer Software, Computer Software Documentation, and Technical Data for Commercial Items are licensed to the U.S. Government under vendor's standard commercial license.
The information contained herein is subject to change without notice. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein.
Microsoft, Windows, Windows XP, and Windows NT are U.S. registered trademarks of Microsoft Corporation. UNIX is a registered trademark of The Open Group.
Contents
4
Figures
Tables
6
About this guide
This guide provides information about:
???using Business Copy XP operations
???preparing Business Copy XP operations
???starting Business Copy XP operations
???performing Business Copy XP operations
???understanding Business Copy XP operation error codes
Intended audience
This guide is intended for customers and
???Disk array hardware and software
???Data processing and RAID storage subsystems and their basic functionsand utilities
Prerequisites
Prerequisites for using this product include:
???Installation of the HP StorageWorks disk array(s)
???Installation of the license key for this product
Related documentation
The following documents provide related information:
???HP StorageWorks Command View XP user guide for XP Disk Arrays
???HP StorageWorks XP Remote Web Console user guide for XP12000/XP10000
???HP StorageWorks Snapshot XP user guide
???HP StorageWorks LUN Con???guration and Security Manager XP user guide for the XP12000/XP10000
???HP StorageWorks LUN Security XP Extension user guide
???HP StorageWorks RAID Manager XP user guide
???Hitachi ShadowImage for z/OS user guide
???HP StorageWorks External Storage XP user guide
???HP StorageWorks Performance Control XP user guide
???HP StorageWorks Flex Copy XP user guide
You can ???nd these documents from the Manuals page of the HP Business Support Center website:
http://www.hp.com/support/manuals
In the Storage section, click Storage Software and then select your product.
Document conventions and symbols
Table 1 Document conventions
CAUTION:
Indicates that failure to follow directions could result in damage to equipment or data.
IMPORTANT:
Provides clarifying information or speci???c instructions.
NOTE:
Provides additional information.
TIP:
Provides helpful hints and shortcuts.
HP technical support
For worldwide technical support information, see the HP support website:
http://www.hp.com/support
Before contacting HP, collect the following information:
???Product model names and numbers
???Technical support registration number (if applicable)
???Product serial numbers
???Error messages
???Operating system type and revision level
8 About this guide
??? Detailed questions
Subscription service
HP recommends that you register your product at the Subscriber's Choice for Business website:
After registering, you will receive
HP websites
For additional information, see the following HP websites:
???http://www.hp.com
???http://www.hp.com/go/storage
???http://www.hp.com/service_locator
???http://www.hp.com/support/manuals
Documentation feedback
HP welcomes your feedback.
To make comments and suggestions about product documentation, please send a message to storagedocs.feedback@hp.com. All submissions become the property of HP.
10 About this guide
1 Business Copy XP (BC) for the Array
HP StorageWorks Business Copy XP (BC) maintains internal copies of user data on disk arrays for purposes such as data backup or duplication. Duplicate volumes are created on the same disk array as the primary volume at hardware speeds. BC is used for UNIX and PC server data, and can provide up to nine duplicates of one primary volume.
This chapter provides instructions for performing BC operations using Command View XP or XP Remote Web Console.
NOTE:
See the HP StorageWorks Command View XP Advanced Edition Device Manager Web Client user guide for instructions on accessing Business Copy from Command View XP Advanced Edition.
BC operations are nondisruptive and allow the primary (main) volume of each volume pair to remain online to all hosts for read and write I/O operations.
After establishing operations, BC operations continue unattended to provide asynchronous internal data backup. Usability is further enhanced through a resynchronization capability that reduces data duplication requirements and backup time, thereby increasing user productivity. BC also supports reverse resynchronization.
You can perform BC operations in conjunction with HP StorageWorks Continuous Access XP operations to provide additional remote copies of BC volumes. BC also supports the disk array's custom volume size (CVS) and Cache LUN features, ensuring that BC operations can duplicate all user data. See Combining BC with other data management operations for further information on combining BC with other data management features.
You can also perform BC operations with External Storage XP operations to create pairs with external volumes.
Overview of BC operations
BC is a
BC components
BC operations on the Command View XP management station or XP Remote Web Console involve primary and secondary volumes in the disk array. Figure 1 shows a typical BC con???guration. BC system components are:
Figure 1 BC overview
Use BC from the Command View XP management station or XP Remote Web Console to make local copies of volumes. The volume that has original data is called a
the second cascade layer are called L2 pairs.
BC volume pairs
Disk arrays contain and manage original and copied BC data. The XP1024/XP128 disk arrays support a maximum of 8,190 BC volumes: 4,095 pairs and the RAID Manager command device. The XP12000 disk array supports a maximum of 16,382 BC volumes (8,191 pairs: (8,191
BC performs copy operations for logical volume pairs that you establish. Each BC pair consists of one primary volume
When a BC volume pair is created, data on the
12 Business Copy XP (BC) for the Array
differential data in the
NOTE:
BC
BC
If the disk array is overloaded, increase cache, disk adapters, and/or RAID groups. Consider assigning BC
Copy Threshold option
If BC performs copy operations when the disk array workload is heavy, host server I/O performance might be degraded. To minimize this performance degradation, enable Copy Threshold, which temporarily stops all BC copy operations when the disk array has a heavy workload. Copy operations that are stopped by the Copy Threshold option resume when the disk array workload is lighter.
This option is different from the Host I/O Performance option (Host I/O Performance option), because it is effective only when the disk array workload is heavy.
NOTE:
Contact your HP support account representative for more information about the Copy Threshold option.
In addition to BC operations, Copy Threshold temporarily stops copy operations for the following applications when the disk array workload is heavy:
???Auto LUN XP
???ShadowImage for z/OS
???Hitachi FlashCopy Mirroring
???Hitachi FlashCopy Mirroring Version 2
???Snapshot XP
???Flex Copy XP
Cascade pairs
The BC cascade function adds a second layer of pairs onto the ???rst layer of original BC pairs. Use these two layers of pairs (L1 and L2) to create and maintain up to nine copies of one original BC primary volume
BC software on the Command View XP management station
When installed on the Command View XP management station, the BC software displays BC information and performs BC operations. The Command View XP management station can be attached to multiple disk arrays. The Command View XP management station acquires status from and issues commands to BC
BC requirements for the array
BC operations provide local copies of UNIX/PC server volumes (LUs) on the disk array. The following table describes the operational requirements for BC.
Table 2 BC operational requirements for the array
14 Business Copy XP (BC) for the Array
1Maximum number of pairs per disk array depends on installed ???rmware version.
Maximum number of pairs for the array
When you create BC pairs, resources called differential tables are required. The number of differential tables available in one disk array depends on the array's amount of shared memory for differential tables.
???You can use 13,652 differential tables if no additional shared memory for differential tables is installed.
???You can use 30,718 differential tables if additional shared memory for differential tables is installed.
NOTE:
Contact your HP account support representative for more information about adding additional shared memory.
NOTE:
The maximum number of pairs you can create is 8,192, no matter how much shared memory for differential tables is available. If a command device is installed in order to use RAID Manager, the maximum number of pairs is 8,191 (when con???guring pairs of 1
To calculate the maximum number of BC pairs, you must calculate how many differential tables are required to create BC pairs, and compare the result with the number of differential tables in the disk array.
The following applications also use differential tables:
???ShadowImage for z/OS
???Hitachi FlashCopy Mirroring
???Hitachi FlashCopy Mirroring version 2
???Flex Copy XP
???Auto LUN XP
???Snapshot XP
For more information, refer to the following documents:
???For ShadowImage for z/OS, Hitachi FlashCopy Mirroring, and Hitachi FlashCopy Mirroring Version 2, see the Hitachi ShadowImage for z/OS user guide.
???For Flex Copy XP, see ???Calculating the maximum number of Flex Copy XP copy pairs???.
???For Auto LUN XP, see ???Calculating the number of Auto LUN XP concurrent migration plans???.
???For Snapshot XP, see the HP StorageWorks Snapshot XP user guide.
If BC is used in the same disk array as any of these applications, the number of available differential tables for BC pairs is the number of differential tables in the disk array minus the number of differential tables used by other applications.
If only BC uses differential tables, the following section describes how to calculate the number of differential tables required for one BC pair, and the conditions you need to consider when calculating the number of BC pairs that you can create.
NOTE:
You can use RAID Manager's inqraid command to query the number of differential tables required when you create BC pairs. You can also use this command to query the number of unused differential tables in the disk array. For more information about the inqraid command, see the HP StorageWorks RAID Manager XP user guide.
Calculating the number of differential tables for one BC pair
When you create a BC pair, the number of required differential tables changes according to the emulation type of the volumes. Use the equations in Table 3 to calculate the total number of differential tables per pair.
16 Business Copy XP (BC) for the Array
Table 3 Total number of differential tables per pair
1If the selected volume is a CVS (custom volume size) volume, use the capacity of the custom volume instead of the default volume capacity for the emulation type. Since the
21 KB equals 1024 bytes.
Table 4 Number of control cylinders according to emulation types
Table 5 shows the relationship between emulation type, capacity, and differential tables. Table 6 shows the number of differential tables used in
Table 5 Relationship between emulation type, capacity, and differential tables
11 GB = 10243 Bytes
Table 6 Number of differential tables used in
18 Business Copy XP (BC) for the Array
11 GB = 10243 Bytes
If you intend to create pairs with volumes of different emulation types, the maximum number of pairs you can create depends on the following conditions.
NOTE:
For more information about calculating total number of differential tables per pair, see Table 3.
Calculating the number of BC pairs if LUSE is not used
Use the following equation to calculate whether the desired number of BC pairs can be created: ??{(??) x (number of BC Pairs)} ??? (??), where:
???(??) is the required number of differential tables per pair (see Table 3).
???(number of BC pairs) is the number of BC pairs you want to create.
???(??) is number of differential tables in the disk array.
???(??) = 13,652 when additional shared memory for differential tables is not installed.
???(??) = 30,718 when additional shared memory for differential tables is installed.
For example, if you create 10 pairs of
1 x 10 + 193 x 20 = 3870 ??? 13,652
Since 3,870 is less than 13,652, 10 pairs of
NOTE:
When the emulation type is
Calculating the number of BC pairs if LUSE is used
Use the following equation to calculate whether the desired number of BC pairs can be created: ??[??{(??) x (number of volumes that form LUSE volumes)} x (number of BC pairs)] ??? (??), where:
???(??) is the required number of differential tables for each volume that forms the LUSE volume.
When you use LUSE volumes to create a BC pair, every volume that forms the LUSE volume uses the differential tables as a pair. For example, if you create a BC pair by using LUSE volumes that are created by combining two
???(??) is number of differential tables in the disk array.
??? (??) = 13,652 when additional shared memory for differential tables is not installed.
20 Business Copy XP (BC) for the Array
??? (??) = 30,718 when additional shared memory for differential tables is installed.
For example, if you create 10 pairs of LUSE volumes consisting of three
(1 x 3) x 10 = 30 ??? 13,652
Since 30 is less than 13,652, 10 pairs of LUSE volumes consisting of three
NOTE:
When the emulation type is
BC operations
Set reserve attribute operation
This operation reserves a volume so it can be used as a BC
A volume might be reserved for BC to ensure that a server does not mount it before BC can use it in a pair. BC cannot use a volume as an
NOTE:
BC leaf volumes (L2 cascade pair) also function as
Reset reserve attribute operation
This operation unreserves a volume so it can be mounted and accessed by all hosts. After you reset the reserve attribute, the disk array accepts all subsequent I/O operations to the volume. Use the Reset Reserve Attribute window (see Resetting reserve attributes) to unreserve volumes.
Paircreate operation
This operation establishes the new BC pairs. The volume that will be the
NOTE:
You can reserve the
Initial copy operation
This operation occurs when you create a new volume pair (see Figure 2). The BC initial copy operation copies all data on the
Before the initial copy operation, the status of a pair is SMPL. The status of the pair is COPY(PD) (PD = pending) while the initial copy operation is in progress. The status changes to PAIR when the initial copy is complete. Write operations performed on the
CAUTION:
Even if a copy operation is completed without any host I/O, the data in the
NOTE:
When creating pairs, you can select the pace for the initial copy operation: slower, medium, and faster. The slower pace minimizes the impact of BC operations on disk array I/O performance, while the faster pace completes the initial copy operation as quickly as possible.
Figure 2 Adding a pair in BC
Update copy operation
This operation updates the
22 Business Copy XP (BC) for the Array
CAUTION:
Even if a copy operation is completed without any host I/O, the data in the
NOTE:
???Update copy operations are not performed for pairs with the following status: COPY(PD) (pending duplex), COPY(SP) (steady split pending), PSUS(SP) (quick split pending), PSUS (split), COPY(RS) (resync),
???Update copy operations do not occur every time a host issues a write I/O operation to the
???If shared memory is lost (for example, of???ine micro exchange or volatile PS on), the differential bitmap is also lost. In this case, the disk array treats the entire BC
Figure 3 Update copy operation
Cascade function
This function creates a second layer of BC volume pairs (L2) underneath the ???rst layer of BC pairs (L1). Cascade pairs are created by clicking Cascade instead of Set in the Paircreate window (see Creating BC pairs (Paircreate)). This cascade layering scheme creates up to nine copies of one BC
Pairsplit operation
The BC split capability, by making the BC copies
Use the Pairsplit window to split existing BC pairs or to add and split new BC pairs in one step. When you split an existing pair, only the differential data is copied to the
new pair, all
While the pair is split, the disk array establishes a track map for the split
Copy pace
When splitting pairs, you can select the pace for the pending update copy operation: Slower, Medium, and Faster. The slower pace minimizes the impact of BC operations on disk array I/O performance, while the faster pace splits the pairs as quickly as possible.
Split type
When splitting pairs, you can select the split type: Quick Split or Steady Split.
???When you specify Quick Split, the pair status changes to PSUS(SP), and the
???When you specify Steady Split, the pair status changes to COPY(SP), and all
NOTE:
Refer to the Table 7 for information about read/write operations from host servers to
Pairresync operations
To change the status of the pairs from PSUS to PAIR, or from PSUE to PAIR, you must resynchronize the pairs. BC can perform the following types of pairresync operations according to the speed and direction of the resynchronization:
???Normal Copy
???Quick Resync
???Reverse Copy
???Quick Restore
Use the Pairresync pane to resynchronize split and suspended BC pairs. When the pairresync operation starts, the pair status changes to COPY(RS) or
NOTE:
You can use BC to perform normal or quick pairresync operations on split and suspended pairs, but you can perform reverse or quick restore pairresync operations only on split pairs.
24 Business Copy XP (BC) for the Array
Forward pairresync operation
A forward pairresync operation resynchronizes pairs by copying data on
???Normal. This operation (see Figure 4) resynchronizes the
???Quick. This operation speeds up the normal pairresync operation without copying the
Figure 4 Normal and quick pairresync operations
CAUTION:
Even if a copy operation is completed without any host I/O, the data in the
Backward pairresync operation
A backward pairresync operation resynchronizes pairs by copying data on
???Reverse. This operation (see Figure 5) synchronizes the
NOTE:
The
???Quick Restore. This operation (Figure 5) speeds up reverse resync by changing the volume map in the disk array to swap the contents of the
26 Business Copy XP (BC) for the Array
Figure 5 Reverse and quick restore pair operations
NOTE:
The
the status changes to PAIR.
NOTE:
When a quick restore operation is in progress, the array management user interface may display old con???guration information. To update the information in the user interface, wait for the quick restore operation to ???nish, and click Refresh.
CAUTION:
During a quick restore operation, the RAID levels, HDD types, and Cache LUN settings of the
To avoid any performance impact due to the quick restore operation
1.Ensure that the
2.Because Cache LUN settings are exchanged during a quick restore operation, you must perform one of the following operations. If you do not, the change of location of cache residence areas may cause I/O performance to the Cache LUN data to be down.
???Set the same Cache LUN settings (locations) for the
???Release the Cache LUN settings of the
CAUTION:
If you do not want the
Table 7 shows the requirements for reverse and quick restore pairresync operations. If you perform these operations on pairs that do not ful???ll the requirements, the reverse copy or quick restore command
is rejected.
Table 7 Requirements for reverse or quick restore pairresync operations
NOTE:
A Continuous Access XP Journal
CAUTION:
If a reverse or quick restore resync operation ends abnormally, or a
NOTE:
When a reverse or quick restore pairresync operation is in progress, you cannot perform paircreate, pairsplit, or pairresync operations for any other pairs sharing the same
28 Business Copy XP (BC) for the Array
Figure 6 BC
Figure 7 BC
XP
Figure 8 BC
XP
Figure 9 BC
Figure 10 BC
Use the Pairresync window to resynchronize split and suspended BC pairs. When the pairresync operation starts, the pair status changes to COPY(RS) or
status changes to PAIR. The disk array resumes BC update copy operations after the pair status changes to PAIR. The
Pair status and time required for pairresync
The pairresync operation can be performed on a split pair or suspended pair. This section describes the relationship between the pair status and the time required for pairresync operations.
???Pairresync for split pair. When a normal/quick pairresync operation is performed on a split pair (status = PSUS), the disk array copies all ???agged tracks from the
???Pairresync for suspended pair. When a normal/quick pairresync operation is performed on a suspended pair (status = PSUE), the disk array copies all data on the
If you perform the quick pairresync operation on the suspended pairs, the update copy operation will be performed and all the data will be copied to the
CAUTION:
When resynchronizing pairs, you can select the pace for the pairresync operation: slower, medium, or faster. The slower pace minimizes the impact of BC operations on subsystem I/O performance. The faster pace resynchronizes the pairs as quickly as possible, but it may affect the disk array's I/O performance.
This operation suspends the BC copy operations to the
The disk array automatically suspends a BC pair when it cannot keep the pair mirrored for any reason. When the disk array suspends a pair, sense information is generated to notify the host. The disk array automatically suspends a pair under the following conditions:
???When the volume pair has been suspended (PSUE) or deleted (SMPL) from an open system host using the RAID Manager command line interface.
???When the disk array detects an error condition related to an initial copy operation. When a volume pair with COPY(PD) status is suspended (PSUE), the disk array aborts the initial copy operation, changes the status of the
???When the disk array detects an error condition related to an update copy operation.
???When the
30 Business Copy XP (BC) for the Array
Use the
This operation stops BC copy operations to the
Use the
CAUTION:
The
BC options
Use the BC options to extend standard BC operations such as the paircreate and pairresync operations. The following table lists the options that are currently available.
Table 8 BC options types and requirements
NOTE:
The number of available option types depends on the disk array's settings.
Swap&Freeze option
This option allows the
The following ???gure shows the state of the
Figure 11 Quick Restore operation with or without Swap&Freeze option
The Quick Restore pairresync operation on a pair with status of PSUS exchanges data in the pair's
Therefore, data on the
Host I/O Performance option
This option prioritizes host I/O responses over BC copy processing time. When you use the Host I/O Performance option, the disk array suppresses execution of BC copy processing, and consequently host I/O responses improve.
When BC copy processing is suppressed, the time taken for copying increases. Also, if ShadowImage for z/OS pairs exist, host I/O responses might not be faster. In this case, set the Host I/O Performance option for ShadowImage for z/OS as well.
Cascade function
This function creates a second layer of volume pairs underneath the ???rst layer of BC pairs. Pairs created in the ???rst and second layer are called cascaded pairs. Figure 12 illustrates cascaded BC volume pairs. The ???rst cascade layer (L1) is the original BC pair, consisting of one
Every volume can have up to three Mirror Unit (MU) numbers associated with it. The MU number designates a pair for which the volume is a member. The MU number is not the number of the pair, but the number of the volume. A pair is made up of two volumes of which each pair member could have the same or different MU numbers.
???MU=0 is the number of a volume for its ???rst pair.
???MU=1 is the number of the same volume for its next pair.
???MU=2 is the number of the same volume for its third pair.
???The MU number of an
32 Business Copy XP (BC) for the Array
For Level 1 (L1) pairs, the root volume could have MU=0, MU=1, and MU=2. For L1 pairs, the associated
For the Level 2 (L2) pairs, the L1
Figure 12 Cascade pairs
When L1 and L2 cascade pairs are created, the
???The root volume is the
???The node volume is the
???The leaf volume is the
Table 9 shows the relationship between L1 pair status and availability of BC pair operations on the associated L2 pairs. To split an L2 pair, you must ???rst split the L1 pair (L1 status = PSUS). The reverse and quick restore pairresync operations cannot be used for L2 pairs. Table 10 shows the relationship between L2 pair status and availability of pair operations on the associated L1 pairs. (CMD RJT = command rejected.) If you delete an L1 pair containing an L2 pair, the L2 pair becomes the L1 pair.
NOTE:
???Combining L1 and L2 pairs with Continuous Access XP volumes is allowed; however, Continuous Access XP considers node and leaf volumes as secondary volumes
???When a
??????MU#??? in Figure 12 means MU number, which identi???es each MU. MU#=1 under
Table 9 Relationship between L1 pair status and L2 pair operations
Table 10 shows the relationship between the L2 pair status and availability of pair operations on the associated L1 pairs. (CMD RJT = command rejected.) If you delete an L1 pair containing an L2 pair, the L2 pair becomes the L1 pair.
34 Business Copy XP (BC) for the Array
Table 10 Relationship between L2 pair status and L1 pair operations
1MU# of L2 node pair member must be 1 or 2. 2Not displayed by the array management interface.
The read/write operation to each volume (root, node, or leaf) from the host is enabled or disabled depending on the status of L1/L2 pairs. The read/write operation from the host can always be performed to the root volume regardless of the status of L1/L2 pairs. Table 11 shows the relationship between read/write operations from host to node volume and status of L1/L2 pairs. Table 12 shows the relationship between read/write operations from host to leaf volume and L2 pair status.
Table 11 Read/write operation (host to the node volume) and L1/L2 pair status
Table 12 indicates the relationship between the read/write operation from the host to the leaf volume and the L2 pair status.
Table 12 Read/write operation (host to the leaf volume) and L2 pair status
In the past, a BC pair group split each LUN pair in the group at a slightly different time. If the application data spanned multiple LUNs in the group, there was the chance of data corruption unless the application was stopped before the split. With the
At this time, the
XP Remote Web Console is disabled.
A BC consistency group (CTG) is a
BC consistency groups and the
???You can con???gure up to 128 consistency groups in a disk array, including BC consistency groups.
???A number
???You can de???ne up to 4,096 BC pairs in a consistency group. However, for LUSE volumes containing n LDEVs, you should count as n volumes. For more information about LUSE volumes, see the HP StorageWorks LUN Con???guration and Security Manager XP user guide for the XP12000/XP10000.
???BC pairs and ShadowImage pairs cannot
???To con???gure BC consistency groups, use the RAID Manager software. However, to con???rm the BC consistency group numbers, use BC (see Volume list).
When the
36 Business Copy XP (BC) for the Array
Figure 13 Overview of
Enabling the
1.Create BC
a.De???ne a consistency group for BC pairs. You cannot de???ne L1 and L2 cascade pairs (see Cascade function) sharing the same node volume in a consistency group. If you specify such pairs in the same consistency group, the paircreate command will be rejected.
b.Specify the
c.Execute the paircreate command.
2.Execute the pairsplit command on the new BC
The
NOTE:
???You can perform BC pair operations (see Performing BC operations) from the Command View XP management station or XP Remote Web Console on the BC
???When the RAID Manager pairsplit operation ends abnormally, all BC pairs in the same consistency group are suspended (status = PSUE).
???When the host server is down or has failed, a consistency group with no BC pairs can be de???ned. If you execute the paircreate command with the
???Do not mix pairs created with the
???If you use the
NOTE:
After the pairsplit, response time of the ???rst I/O to each logical unit (LU) can be up to approximately ???ve seconds in the worst case. This worst case should be in a
Pair status
The BC remote console software displays the pair status of all BC volumes (LUs) on the speci???ed port of the connected disk array. The following ???gure shows the BC pair status transitions and the relationship between pair status and BC operations.
Figure 14 BC pair status transitions
The following describes BC pair status conditions:
1.If a volume is not assigned to a BC pair, its status is SMPL.
2.Select the SMPL volumes for the
3.When the initial copy operation is complete, the pair status becomes PAIR, and the differential data between the
38 Business Copy XP (BC) for the Array
4.The following are the types of pair status (PSUS and PSUE) when the pair is not synchronized:
???When you split a pair (pairsplit), the pair status changes to COPY(SP) or PSUS(SP) for quick pairsplit. During the pairsplit process, the pair status becomes COPY(SP). If you specify Quick Split pairsplit, the pair status becomes PSUS(SP) during the process. When the pairsplit operation is complete, the pair status changes to PSUS and you can access the split
???If the disk array cannot maintain PAIR status for any reason or if you suspend the pair
NOTE:
???When you specify reverse or quick restore mode for a pairresync operation, the pair status changes to
???When you delete a pair
5.When you start a pairresync operation, the pair status changes to COPY(RS) or
Table 13 BC pair status conditions
Cautions on switching off the power supply
To switch off the power supply of the disk array during BC operations, make sure to:
???Complete copying for the BC pair in COPY(SP) or PSUS(SP) status ???rst to change the pair status from COPY(SP) or PSUS(SP) to PSUS, and then switch off the power supply. If shared memory is volatilized when you switch on the power supply again, the pair in COPY(SP) or PSUS(SP) status changes to PSUE.
40 Business Copy XP (BC) for the Array
NOTE:
If the shared memory is volatilized when you switch on the power supply again, the pair in the COPY(SP) or PSUS(SP) status changes to PSUE.
NOTE:
If the status of only a part of the pairs in the same consistency group is changed, the processing of
???Establish a timetable for BC copying operations. If shared memory is volatilized when you switch on the power supply again, the following conditions occur:
???If the BC pair was in COPY(PD) or COPY(SP) status, data already copied becomes target data to be copied after the power supply is switched back on. Even if there is no host I/O, the data consistency rate does not reach 100% when the BC pair status changes to PAIR. When the BC pair status changes to PAIR, target data is copied to the secondary volume.
???If the BC pair was in PAIR status, data already copied becomes target data to be copied after the power supply is switched back on. In this case, the data consistency rate is 0%, and target data is copied to the
???If the BC pair was in PSUS status, the entire volume becomes differential data. In this case, the data consistency rate is 0%, and the entire volume is copied to the secondary volume when you perform the pairresync operation.
Cautions on using the XP10000
The XP10000 has a fewer processors than the XP12000. Therefore, BC copy processing sometimes takes a long time and host I/O performance may degrade. Consider the following:
???Copy processing
When you use BC on the XP10000, copy processing time (such as pair creation, pair split, and pair resynchronization) might take longer compared to when you use BC on the XP12000. Copy processing time changes according to the number of pairs, and sometimes the XP10000 requires two to eight times the copy processing time compared to the XP12000.
???Host I/O performance
Since BC copy processing uses processors, host I/O performance might degrade during copy processing. The number of processors in the XP10000 is small, therefore, when you use the XP10000, the impact of copy processing on host I/O performance is larger than when you use the XP12000. To mitigate host I/O performance degradation, reduce the copy pace or use the Host I/O Performance option.
For more information about specifying the copy pace, see Copy Pace list. For more information about the Host I/O Performance option, see Host I/O Performance option.
Preparing for BC operations
System requirements
BC operations involve the disk array containing the primary and secondary volumes and the licensed BC feature enabled on the Command View XP management station or XP Remote Web Console. System requirements for BC are:
???Disk array hardware, microcode, and software required for BC operations must be installed and enabled.
???Command View XP management station
???BC license key installed.
Preparing for BC operations
To ensure that you and your disk arrays are ready for BC operations, perform the following tasks:
???BC operations affect I/O performance of the disk array because of copy operations to the
???If you are using more than one disk array data management feature (such as BC, Continuous Access XP, or Cache LUN) at the same time in the same disk array, contact your HP account support representative to ensure that your disk array is optimized for your con???guration of concurrent operations. Each disk array feature can affect disk array performance and/or operation of other features. For example, BC and Continuous Access XP operations both involve initial copy and update copy operations to secondary/remote volumes in addition to host I/O workload.
???Identify the volumes (LUs) you will use for BC operations. For each volume, write down the full SCSI path (port, target ID (TID), and LUN), whether the volume will be a
Table 14 Identifying the volumes for BC operations
42 Business Copy XP (BC) for the Array
Combining BC with other data management operations
BC supports concurrent operations with the following data management functions:
???LU Size Expansion (LUSE). LUSE volumes can be assigned to BC pairs if the
???CVS. CVS volumes can be assigned to BC pairs if the
to return the volume to SMPL status.
???LUN Security. LUN Security operations do not affect BC operations. Volumes under secure ports and/or assigned to World Wide Name (WWN) groups and/or LUN groups can also be assigned to BC pairs. Volumes assigned to BC pairs can also be assigned to secure ports, WWN groups, and/or LUN groups for LUN Security.
NOTE:
BC
???Cache LUN. Cache LUN volumes can be assigned to BC pairs. Cache LUN operations can be performed on BC
CAUTION:
See Pairresync operations for important information on performing quick restore operations on Cache LUN volumes.
???Continuous Access XP Journal. Continuous Access XP Journal volumes can be assigned to BC pairs, and BC volumes can be assigned to Continuous Access XP Journal pairs.
???Continuous Access XP. Continuous Access XP volumes can be assigned to BC pairs, and BC volumes can be assigned to Continuous Access XP pairs. See Combining BC and Continuous Access XP operations for important information on BC and Continuous Access XP shared volume con???gurations.
???Auto LUN. BC can be assigned to Auto LUN migration volumes. However, if the BC
If you split the BC pair assigned to Auto LUN migration volumes, migration of those volumes will be canceled.
NOTE:
You cannot use Auto LUN migration, destination, and reserved volumes for BC pair operations (the command will be rejected). To use Auto LUN volumes for BC pair operations, use Auto LUN to release the volumes.
???LUN Security XP Extension.
???External Storage XP. BC operations can be performed with External Storage XP operations to create pairs with the external volumes.
Combining BC and Continuous Access XP Journal operations
Continuous Access XP Journal volumes can be assigned to BC pairs, and BC volumes can be assigned to Continuous Access XP Journal pairs.
BC and Continuous Access XP Journal can function together in the same Local disk array to provide both internal and remote backup for your important data.
NOTE:
???A primary volume
???Combining BC L1 and L2 pairs with Continuous Access XP Journal volumes is allowed. Continuous Access XP Journal considers node and leaf volumes as secondary volumes
The con???guration shown in Figure 15 is an example of a volume that functions as both a Continuous Access XP Journal
???Use BC to provide
???Use Continuous Access XP Journal to provide remote backup copies of BC
Figure 15 BC and Continuous Access XP Journal: Shared
CAUTION:
When you share a BC
The con???guration shown in Figure 16 is an example of a volume that functions as both a Continuous Access XP Journal
44 Business Copy XP (BC) for the Array
Figure 16 BC and Continuous Access XP Journal: Shared
Figure 17 is an example of a volume that functions as both a Continuous Access XP Journal
???Use BC to provide
???Use Continuous Access XP Journal to provide remote backup of BC
Figure 17 BC and Continuous Access XP Journal: Shared
NOTE:
In the con???guration shown in Figure 17, you cannot perform the Business Copy XP and Continuous Access XP Journal copy operations at the same time. In Figure 17, ???rst you need to create and split the Business Copy XP pair, then create the Continuous Access XP Journal pair. If you want to resynchronize the Business Copy XP pair, suspend the Continuous Access XP Journal pair beforehand. Note that you cannot change the Continuous Access XP Journal pair status while the Business Copy XP pair
is in PSUS(SP) status.
NOTE:
Usually Continuous Access XP and Continuous Access XP Journal can share volumes with BC. However, in some cases, you cannot create BC pairs using volumes shared with Continuous Access XP and Continuous Access XP Journal. For more information about combining BC, Continuous Access XP, and Continuous Access XP Journal, see Figure 22 and Figure 23.
Combining BC and Continuous Access XP operations
BC and Continuous Access XP can function together in the same disk array to provide both internal and remote backup for important data.
NOTE:
???BC is recommended for
???Combining BC L1 and L2 pairs with Continuous Access XP volumes is allowed. Continuous Access XP considers node and leaf volumes secondary volumes
NOTE:
Reverse resync and quick restore operations cannot be performed on BC/Continuous Access XP shared volume pairs.
The con???guration shown in Figure 18 is an example of a volume functioning as both a Continuous Access XP
???Use BC to provide
???Use Continuous Access XP to provide remote backup copies of BC
Figure 18 BC and Continuous Access XP: shared
The con???guration shown in Figure 19 is an example of a volume functioning as both a Continuous Access XP
46 Business Copy XP (BC) for the Array
Figure 19 BC and Continuous Access XP: shared
CAUTION:
When you share a BC
The con???guration shown in Figure 20 is an example of a volume functioning as both a Continuous Access XP
???Use BC to provide
???Use Continuous Access XP to provide remote backup of BC
Figure 20 BC and Continuous Access XP: shared
The con???guration shown in Figure 21 is an example of a volume functioning as both a BC
NOTE:
This con???guration does not allow BC and Continuous Access XP to copy at the same time. Create the BC pair ???rst, and then split the pair before creating the Continuous Access XP pair. You must suspend the Continuous Access XP pair to resync the BC pair. The Continuous Access XP pair status cannot be changed when the BC pair is in PSUS(SP) status.
Figure 21 BC and Continuous Access XP: shared
Usually Continuous Access XP and Continuous Access XP Journal can share volumes with BC. However, in some cases, you cannot create BC pairs using volumes shared with Continuous Access XP and Continuous Access XP Journal. Figure 22 and Figure 23 show examples of when you cannot create BC pairs using volumes shared with Continuous Access XP and Continuous Access XP Journal.
NOTE:
A Continuous Access XP Journal primary volume
Figure 22 is an example of a volume functioning as both a Continuous Access XP Journal
Figure 22 BC, Continuous Access XP Journal, and Continuous Access XP: Shared
Figure 23 is an example of a volume functioning as both a Continuous Access XP
48 Business Copy XP (BC) for the Array
Figure 23 BC, Continuous Access XP, and Continuous Access XP Journal: Shared
Combining BC with LUN Security XP Extension
BC can create pairs using volumes for which LUN Security XP Extension sets the access attribute. However, you cannot create a BC pair specifying a volume with the
Table 15 shows whether you can specify the volume with access attribute as a
Table 15 Access attribute and availability as a BC pair volume
Table 16 shows whether you can perform BC operations on the volume with the
Table 16 Availability of BC operations on volumes with the
1Paircreate and Pairsplit means you simultaneously create and split BC pairs.
Copying access attributes
If you create a BC pair using volumes that LUN Security XP Extension has set to VMA (Volume Management Area), you can copy information about the access attribute in the
Table 17 VMA setting and availability of Paircreate operation
NOTE:
You can specify a volume with VMA as a reserve volume.
Figure 24 shows the process of copying of access attribute when you create a pair using volumes with VMA.
NOTE:
When you use volumes with VMA to create a BC pair, both the
Figure 24 Copying access attribute
In Figure 24, if both the
50 Business Copy XP (BC) for the Array
CAUTION:
Because the
You can set VMA, which is required to copy the access attribute, only when the volume's emulation type is
Whether you can use LUN Security XP Extension to change or reference the access attribute for BC pair volumes depends on the pair status. Table 18 shows the availability of LUN Security XP Extension operations according to the pair status.
Table 18 Pair status and availability of LUN Security XP Extension operations
1If the VMA copy is not completed, referred information might not be the same as the
2When the
License capacity of LUN Security XP Extension
To create BC pairs using volumes with VMA, you need the license capacity of LUN Security XP Extension for both
You can also copy access attributes of cascaded pairs. Figure 25 shows the required license capacity of LUN Security XP Extension when you create cascaded pairs using volumes with VMAs and access attributes.
Figure 25 Required license capacity for LUN Security XP Extension when using cascade function
In Figure 25, VMAs are set to cascaded pairs' volumes. Before copying, the root volume's access attribute is Read Only, the node and leaf's access attribute is Read/Write. When copy operations, such as update copy or pairresync, are performed on these cascaded pairs, the root volume's access attribute is copied to the node and leaf volumes. Therefore, to set the access attribute for volumes used in cascade pairs, LUN Security XP Extension needs license capacity for the root volume and the node and leaf volumes. If you set the access attribute to the root, node, or leaf volume, LUN Security XP Extension requires license capacity for the root, node, and leaf volumes.
NOTE:
If LUN Security XP Extension's license capacity is insuf???cient, you might not able to create BC pairs. For more information about LUN Security XP Extension's license capacity, see the HP StorageWorks LUN Security XP Extension user guide.
Starting BC
After you enable the BC feature on the Command View XP management station or XP Remote Web Console and prepare for BC operations, you are ready to start BC.
1.Launch Command View XP or XP Remote Web Console.
2.Click the Business Copy button 
. The BC main screen shows the name of the connected disk array, currently selected port, and all volumes (LUs) installed under the current port.
52 Business Copy XP (BC) for the Array
Figure 26 BC main screen
You can now perform BC operations. You ???rst need to reserve the volumes you plan to use as BC
BC main screen
The BC main screen displays BC volume and pair information for the selected port of the connected disk array and performs all BC operations. To open the BC main screen, click the BC button. There are four tabs on the BC main screen: Display, History, Options, and Snapshot XP.
NOTE:
The Snapshot XP tab appears only when Snapshot XP is installed. Although the BC main screen displays information about BC and Snapshot XP pairs, this section only explains BC pair items. For more information about Snapshot XP pair items, see the HP StorageWorks Snapshot XP user guide.
The Display pane of the BC main screen has the following features:
???Use the Tree View box on the left side to select the port, host group, or de???ned
Table 19 BC tree icons
Icon Meaning
Port
Host group
LUN
Root
NOTE:
You can ???lter volumes or volume pairs displayed in the Volume list on the
???The Volume list on the
NOTE:
The maximum number of volumes that can be displayed in the Volume List at one time is 1,024. If the number of volumes de???ned in the disk array exceeds this limit, use the Previous and Next buttons on the upper right of the Volume list to turn the pages of the Volume list to see the entire list.
???The following icons indicate the status of a volume or pair:
Table 20 Status icons for BC
???The Preset Volume list, below the Volume list, displays the content of the operations (volume/pair information) that have been set or speci???ed, but are not yet applied to the disk array.
???The Volume/Pair Settings box on the
NOTE:
The Volume/Pair Settings information is displayed above and below the Preset Volume list.
???Preset: Number of operations (volume/pair information) that have not been performed in the disk array. The Preset Volume list, located below the Volume list, displays preset operations. Click Apply to perform the speci???ed operations displayed in the Preset Volume list.
???Volume: Total number of volumes de???ned in the disk array.
???Pairs: W(X)/Y/Z, where:
W = total number of BC pairs
X = total number of BC and ShadowImage for z/OS pairs Y = total number of Snapshot XP pairs
Z = maximum number of pairs that can be created in one array (BC/Snapshot XP/ShadowImage for z/OS /Auto LUN XP/Flex Copy/Hitachi FlashCopy Mirroring/Hitachi FlashCopy Mirroring Version 2)
54 Business Copy XP (BC) for the Array
NOTE:
The value (X) does not include Auto LUN XP, Flex Copy, Snapshot XP, Hitachi FlashCopy Mirroring, or Hitachi FlashCopy Mirroring Version 2 pairs. If these pairs exist, BC paircreate operations may fail, even when (X) is less than 8,191.
???Reserve: X(Y)/Z, where:
X = total number of BC reserved volumes
Y = total number of BC and ShadowImage for z/OS reserved volumes
Z = maximum number of reserved volumes that can be created in one array (BC/ShadowImage for z/OS /Auto LUN XP/Flex Copy)
NOTE:
The value (Y) does not include Auto LUN XP, Flex Copy, Snapshot XP, Hitachi FlashCopy Mirroring, or Hitachi FlashCopy Mirroring Version 2 pairs. If these pairs exist, the BC paircreate operation may fail even when (Y) is less than 8,191.
???Use the Display Filter button to ???lter volumes displayed in the Volume list.
???The Previous button returns to the previous page of the Volume list. This button is available only when the number of volumes de???ned in the disk array exceeds 1,024, which is the maximum number of volumes that can be displayed on one page. The button is unavailable if the total number of de???ned volumes is less than 1,024.
???The Next button displays the next page of the Volume list. This button is available only when the number of volumes de???ned in the disk array exceeds 1,024, which is the maximum number of volumes that can be displayed on one page. The button is unavailable if the total number of de???ned volumes is less than 1,024.
???The Apply button performs BC operations displayed in the Preset Volume list in the disk array. If the speci???ed operations complete successfully, the Preset Volume list is cleared. If an error occurs during an operation, the failed operation remains in the Preset Volume list. To display the error code and message for the failed operation, select the Detail command.
???The Cancel button cancels all operations speci???ed on the Display tab.
To perform BC operations for volumes, select one or more volumes in the Volume list,
For information about the Snapshot XP tab, see the HP StorageWorks Snapshot XP user guide.
Volume list
The Volume list (Figure 27) displays volume/pair information based on ???lter options selected in the Tree View box (along the left side of the screen).
NOTE:
You can select up to 512 volumes/pairs in the Volume list.
NOTE:
The maximum number of volumes displayed in the Volume List is 1,024. If the number of volumes de???ned in the disk array exceeds this limit, use the Previous and Next buttons on the upper right of the Volume list to turn the pages of the Volume list to see the entire list.
Figure 27 Volume list
The Volume list contains all installed volumes (LUs) on the selected port and displays the following information for each volume:
???Port: Port ID (cluster and channel number) of each volume. If L2 pairs exist, a different icon displays. To display detailed information on L2 pairs,
???
???LUN: CU:LDEV (control unit image:logical device ID) of each volume.
NOTE:
An LDEV number ending with # (for example, 00:01#) indicates the LDEV is an external volume.
???MU: MU number of a BC cascade pair formed with the volume. For more information about what appears if you select Snapshot XP pairs, see the HP StorageWorks Snapshot XP user guide.
???Status: BC pair status of the volume pair: SMPL, COPY(PD), PAIR, PSUS, COPY(RS), PSUE, COPY(SP),
???Port: Port ID (cluster and channel number) of the ???rst
???
???LUN(S): CU:LDEV (control unit image:logical device ID) of the
NOTE:
An LDEV number ending with # (for example, 00:01#) indicates the LDEV is an external volume.
???CTG: Consistency group number of the
???SvolMode: Status of the
HP StorageWorks Snapshot XP user guide.
???
???Hide Mode: When the
???CopyPace: Copy pace (Slower, Medium, or Faster) for the pair being created. For more information about the Snapshot XP pair status, see the HP StorageWorks Snapshot XP user guide.
???Prog/Sync: If the volume pair is in COPY status, the copy progress (%) is displayed (for example, 0% or 45%). If there is no
???Type: Device emulation type (for example,
???Capacity(MB): Storage capacity of the volume in MB.
???CLPR(P): The cache logical partition of the
???CLPR(S): the cache logical partition of the
56 Business Copy XP (BC) for the Array
You can perform BC operations for volumes in the Volume list by using the following shortcut menu commands (see also Table 21):
???Detail: Displays pair status for selected volumes/pairs.
???Paircreate: Creates or adds new BC pairs.
???Pairsplit: Splits BC pairs.
???Pairresync: Resynchronizes BC pairs.
???
???
???Change Reserve: Sets and resets the BC reserve attribute.
???
???Display Filter: Filters volumes displayed in the Volume list. Clicking Display Filter is another method of accessing this command.
Table 21 BC operations shortcut menu commands
Detail window
This window displays information for the selected volume or pair. To open the Detail window, select a pair or volume in the Volume list,
NOTE:
If you select the Detail command when selecting a Snapshot XP pair, the displayed Detail window is different then when you select a BC pair. For more information, see the HP StorageWorks Snapshot XP user guide.
Figure 28 Detail window
This window displays information on the selected pair (all paths de???ned for the
Figure 29
NOTE:
The
58 Business Copy XP (BC) for the Array
Display Filter window
This window ???lters volumes displayed in the Volume list by reserve attribute, pair condition, and pair status. To open the Display Filter window, click Display Filter on the BC main screen, or select any pair or volume in the Volume list,
Figure 30 Display Filter window (BC tab selected)
The Display Filter window (BC tab selected) has the following features:
???CLPR: Displays the speci???ed cache logical partition (CLPR).
???Volume Type:
???Internal Vol: Displays or hides internal volumes.
???External Vol: Displays or hides external volumes.
NOTE:
Both check boxes are selected by default.
???Attribute:
???Reserve(d): Displays reserved or unreserved volumes. If you select the Reserve(d) check box, only reserved volumes appear in the Volume list. If you clear the Reserve(d) check box, only unreserved volumes appear.
NOTE:
If you select the Reserve(d) check box, you cannot select any other check boxes.
NOTE:
The disk array automatically reserves volumes speci???ed as a BC pair
???Pair: Displays paired volumes.
???
???External Vol: Displays external volumes.
???Cascade: Filters pairs in the Volume list by cascade level. Selecting L1 displays only L1 pairs. Selecting
???Pair Status:
???BC: Displays or hides BC pairs.
???Snapshot XP: Displays or hides Snapshot XP pairs.
NOTE:
If a check box is not selected, all check boxes in each tab are grayed out.
???BC: Check boxes for the pair statuses are available only when you select the Pair check box in the Attribute box. If you select the check boxes, you can display pairs in those statuses. You must also select the BC check box in the Pair Status tab to use these check boxes.
???Snapshot XP: This tab is for Snapshot XP pairs, and only appears if Snapshot XP is installed. For more information, see the HP StorageWorks Snapshot XP user guide.
???OK button: Applies the settings, and closes the Display Filter window.
???Cancel button: Resets the settings, and closes the Display Filter window.
NOTE:
Filter settings are only effective within the current BC session. If you switch to another program feature (such as LUN Manager or Continuous Access XP) or click a button on the toolbar, the settings are reset.
Preset Volume list
The Preset Volume list is located below the Volume list, and lists the speci???ed operations (volume/pair information) that have not been performed in the disk array.
Figure 31 Preset Volume list
Use the Preset Volume list to hold multiple settings of the same operation only. You cannot display different types of operations (for example, pairsplit and pairresync) in the Preset Volume list at the same time. You can also cancel the operations in the Preset Volume list.
The Preset Volume list displays the following information of speci???ed operations:
???Port: Port ID (cluster and channel number) of each volume. If L2 pairs exist, a different icon displays.
???Group
???CLPR (P): The cache logical partition (CLPR) of the
???CLPR (S): The cache logical partition (CLPR) of the
???Path (LUN): CU:LDEV (control unit image:logical device ID) of each volume.
NOTE:
An LDEV number ending with # (for example, 00:01#) indicates the LDEV is an external volume.
???MU: MU number of a BC cascade pair member volume. For more information about what appears if you select Snapshot XP pairs, see the HP StorageWorks Snapshot XP user guide.
???Port: Port ID (cluster and channel number) of the ???rst
???Group
???
60 Business Copy XP (BC) for the Array
NOTE:
An LDEV number ending with # (for example, 00:01#) indicates the LDEV is an external volume.
???Pace: Copy pace for all pairs being created: Slower, Medium, and Faster. For more information about what appears if you select Snapshot XP pairs, see the HP StorageWorks Snapshot XP user guide.
???Code: If the speci???ed option in the Preset Volume list is performed by clicking Apply, but the operation fails, the reason code is displayed.
To perform the speci???ed operations, click Apply on the BC main screen. When all operations are performed successfully, the Preset Volume list is cleared. However, failed operations remain in the Preset Volume list. You can also cancel one or all operations by using the following shortcut menu commands:
???Delete: Cancels the selected operation only. To display the Delete command, select a volume or pair, and
???Delete All: Cancels all operations displayed in the Preset Volume list. To display the All Delete command, deselect any volume or pair, and
???Detail: Displays the Error window, which lists error code and message for the failed operation.
Performing BC operations
Setting reserve attributes
Use the Set Reserve Attribute window to set the reserve attribute for volumes selected on the BC main screen. To open the Set Reserve Attribute window, select one or more unreserved SMPL volumes in the Volume list on the BC main screen,
Figure 32 Set Reserve Attribute window
The Set Reserve Attribute window displays unreserved volumes selected on the BC main screen. Clicking OK sets the reserve attribute for unreserved volumes.
The setting is displayed in the Preset Volume list on the BC main screen. The Cancel button closes the Set Reserve Attribute window without re???ecting the settings. To apply the settings to the disk array, click Apply on the BC main screen.
Reserving one or more volumes for use as BC
1.Unmount the volumes you want to reserve. The disk array rejects all write I/Os to reserved volumes (except when in PSUS status).
2.From the BC main screen, select the port, host group, or LUN in the Tree View box.
3.Display reserved SMPL volumes in the Volume List.
NOTE:
To display unreserved SMPL volumes in the Volume List, open the Display Filter window, clear the Reserved and Pair check boxes, select the
4.Select the volumes,
5.From the Set Reserve Attribute window, select the volumes you want to reserve, and click OK. The setting is re???ected in the Preset Volume list on the BC main screen.
6.From the BC main screen, click Apply.
7.Verify that the settings are re???ected in the disk array. To check the attribute, click Display Filter.
NOTE:
You can check whether the attribute setting is updated on the Display Filter window. To open the Display Filter window, click Display Filter.
Resetting reserve attributes
Use the Reset Reserve Attribute window to reset the reserve attribute for the volume selected on the BC main screen. To open the Reset Reserve Attribute window, select one or more reserved SMPL volumes in the Volume list on the BC main screen,
Figure 33 Reset Reserve Attribute window
The Reset Reserve Attribute window displays the reserved volumes selected on the BC main screen. Clicking OK resets the reserve attribute for reserved volumes.
The settings are displayed in the Preset Volume list on the BC main screen. The Cancel button closes the Reset Reserve Attribute window without re???ecting the settings. To apply the settings to the disk array, click Apply on the BC main screen.
Unreserving one or more volumes
1. Ensure that the volumes you want to unreserve are no longer assigned to BC pairs as
62 Business Copy XP (BC) for the Array
2.In the BC main screen, select the port, host group, or LUN in the Tree View box.
3.To display reserved SMPL volumes in the Volume list, open the Display Filter window, select the Reserve(d) check box, and click OK.
4.Select the volumes,
5.In the Reset Reserve Attribute window, select the volume you want to unreserve, and click OK. The setting is re???ected in the Preset Volume list on the BC main screen.
6.In the BC main screen, click Apply.
7.Verify that the settings are re???ected in the disk array. To check the attribute, click Display Filter.
Creating BC pairs (Paircreate)
CAUTION:
The BC paircreate operation overwrites all existing data on the
The Paircreate window displays
Figure 34 Paircreate window
The Paircreate window consists of the following components:
???Buttons
Paircreate Volume List
The Volume List in the upper half of the Paircreate window displays the following information about the
NOTE:
The
???Port: Port ID (cluster and channel number) of the
???
???LUN: CU:LDEV of the
NOTE:
An LDEV number ending with # (for example, 00:01#) indicates the LDEV is an external volume.
???MU: MU number of the
???Status: Status of the
???Port: Port ID (cluster and channel number) of the ???rst
???
???SvolMode (LUN(S)): CU:LDEV of the
NOTE:
An LDEV number ending with # (for example, 00:01#) indicates the LDEV is an external volume.
???Type: Emulation type of the
???Capacity (MB): Volume capacity displayed in megabytes (MB).
???CLPR(P): Cache logical partition of the
???CLPR(S): Cache logical partition of the
Copy Pace list
Use the Copy Pace list to select the copy pace for all pairs being created: Slower, Medium, and Faster.
NOTE:
When the Preset List already contains Paircreate settings, and you specify a different copy pace for new pairs in the Paircreate window, the copy pace for existing paircreate settings in the Preset List are also changed. The latest copy pace speci???ed in the Paircreate window is in effect before the settings are re???ected to the disk array.
Select MU list
Use the Select MU list to select the MU number for each pair being created: 0, 1, and 2 for L1 pairs, and 1 and 2 for L2 pairs.
64 Business Copy XP (BC) for the Array
NOTE:
You can select an MU number for a cascade pair. You cannot select the same MU number for different cascade pairs of the same
Select
This box ???lters
???Port list: Displays available
???Volume Type:
???Internal Vol: Select available
???External Vol: Select available
NOTE:
You can select external volumes only when External Storage XP is available.
???Attribute: Select available
NOTE:
The number of secondary volumes that can be displayed in the
???Previous: Returns to the previous page of the
???Next: Turn to the next page of the
???
???Port: Port ID (cluster and channel number) of the
???Group
???
???Pair Num: Number of pairs.
???Type: Emulation type of the
???Capacity (MB): Capacity of the
???CLPR: The cache logical partition (CLPR) of the
Buttons
???Set: Adds the selected
???Change: Replaces the existing
???Cascade: Adds the selected
???OK: Adds the operation (setting) to create a new pair using the
NOTE:
To apply the new pair operation setting displayed in the Preset List to the disk array, click Apply on the BC main screen.
??? Cancel: Cancels the operations set in the Paircreate window and closes the Paircreate window.
To remove any volumes from the Paircreate Volume List or
Creating L1 pairs
To create new BC pairs and split them immediately so you can access the
1.Ensure that the
2.In the BC main screen, select the port, host group, or
3.Select the
NOTE:
Do not select reserved volumes.
4.Set the initial copy pace for all pairs being created: Slower, Medium, or Faster.
5.Verify that the Paircreate window displays the
6.Select the
a.Select the
b.In the Select MU list, select the MU number for the L1 pair being created: 0, 1, or 2.
c.Select the port in the Port list, select the Reserved check box to display reserved volumes, and select the
NOTE:
You can select an unreserved volume as the
d.Click Set to create (add) the
e.To add a second and third
7.Repeat step 6 until all pairs are displayed. Click Change to replace an
8.When the Paircreate window displays the new pairs, click OK to re???ect all pairs (settings) in the list to the Preset Volume list on the BC main screen.
9.From the BC main screen, click Apply to create the pairs.
When the initial copy operations start, the BC main screen shows new pairs with COPY(PD) status and progress (%) of the initial copy operations.
10.Click Refresh () to monitor the progress of the initial copy operations.
66 Business Copy XP (BC) for the Array
CAUTION:
The L2 paircreate operation overwrites all existing data on the L2
Creating L2 pairs
1.Ensure that the L2
2.In the BC main screen, select the L1 pairs to which you want to add the L2 pairs,
3.In the Paircreate window, select the L1 node volume, select the MU number (1 or 2) in the Select MU list, and select the
4.Click Cascade to add the L2 pair to the list of pairs.
5.Repeat until all L2 pairs are displayed. Click Change to replace an
6.When the Paircreate window displays all new pairs, click OK to re???ect all pairs (settings) in the list to the Preset Volume list on the BC main screen.
7.In the BC main screen, click Apply to create the pairs.
When the initial copy operations start, the BC main screen shows new pairs with COPY(PD) status and progress (%) of the initial copy operations.
8.Click Refresh () to monitor the progress of the initial copy operations.
Splitting BC pairs (Pairsplit)
The Pairsplit window displays volume and pair information for volumes and/or pairs selected on the BC main screen. Use the Pairsplit window to split existing BC pairs, or simultaneously create and split new BC pairs (see Creating and splitting pairs ). To open the Pairsplit window, select volumes or pairs in the Volume list on the BC main screen,
Figure 35 Pairsplit window
The Pairsplit window consists of the following components:
???Buttons
???Creating and splitting pairs
Pairsplit Volume List
This list in the upper half of the Pairsplit window displays the following information about the
???Port: Port ID (cluster and channel number) of the
???Group
???(Path) LUN: CU:LDEV of the
NOTE:
An LDEV number ending with # (for example, 00:01#) indicates the LDEV is an external volume.
???MU: MU number of the
???Status: Status of the
???Port: Port ID (cluster and channel number) of the ???rst
???Group
???SvolMode (LUN(S)): CU:LDEV of the
NOTE:
An LDEV number ending with # (for example, 00:01#) indicates the LDEV is an external volume.
???Type: Emulation type of the
???Capacity (MB): Volume capacity displayed in megabytes (MB)
???CLPR(P): Cache logical partition of the
???CLPR(S): Cache logical partition of the
Window options
Copy Pace list
Use this list to select the copy pace (Slower, Medium, or Faster) for all pairs you are splitting. The Set button applies the same copy pace to all pairs you are splitting.
Select MU list
Use this list to select the MU number for each pair being created: 0, 1, and 2 for L1 pairs, and 1 and 2 for L2 pairs.
NOTE:
You can select an MU number for a cascade pair. You cannot select the same MU number for different cascade pairs of the same
Select Split Type list
Use this list to select the pairsplit type: Quick Split or Steady Split.
Select
This box ???lters
???Port: Display available
???Volume Type:
???Internal Vol: Select available
???External Vol: Select available
NOTE:
You can only select external volumes when External Storage XP is available.
???Attribute: Select available
68 Business Copy XP (BC) for the Array
NOTE:
The number of secondary volumes that can be displayed in the
???Previous button: Returns to the previous page of the
???Next button: Turns to the next page of the
???The
???Port: Port ID (cluster and channel number) of the
???Group
???
???Pair Num: Number of pairs
???Type: Emulation type of the
???Capacity (MB): Capacity of the
???CLPR: The cache logical partition (CLPR) of the
Buttons
???Set: Adds the selected
???Change: Replaces the existing
???Cascade: Adds the selected
???OK: Adds the operation (setting) to split a pair composed of the
NOTE:
To apply the new setting displayed in the Preset List to the disk array, click Apply on the BC main screen.
??? Cancel: Cancels operations set in the Pairsplit window and closes the Pairsplit window.
To remove any volumes from the Pairsplit Volume List or the
Splitting pairs
1.If you want the split
CAUTION:
The
2.In the BC main screen, select the port, host group, or
3.Select the pairs you want to split,
4.In the Pairsplit window, set the copy pace (Slower, Medium, or Faster) for all pairs being split. If you change the setting, the latest setting is applied to all pairs
5.Set the split type (Quick Split or Steady Split) for each pair being split. The split type is set for all pairs being split. If you change the setting, the latest setting is applied to all pairs.
6.When the Pairsplit window displays the pairs you want, click OK to add all pairs to the Preset Volume list on the BC main pane. Use the Delete command to remove any pairs from the list.
7.In the BC main screen, click Apply to split the pairs.
When the pairsplit operations start, the BC main screen shows new pairs with COPY(SP) or PSUS(SP) status and progress (%) of the update copy operations. The PSUS status is displayed right away if there were no pending update copy operations
8.Click Refresh () to monitor the progress of the pairsplit operations.
Creating and splitting pairs
Use the pairsplit operation to simultaneously create and split new BC pairs. In this case, the pairsplit operation changes the pair status from SMPL to COPY(SP) or PSUS(SP), copies all data on the
1.If you want the split
CAUTION:
The
2.In the BC main screen, select the port, host group, or
3.Select the volumes that will be the
4.Set the copy pace (Slower, Medium, or Faster) and split type (Quick or Steady) for all pairs being created and split.
5.Specify the
a.Select the
b.In the Select MU list, select the MU number (0, 1, or 2) for the L1 pair to be created.
c.Select the port in the Port list, display either reserved or unreserved volumes, and click the
d.Click Set to add the
e.To add another
6.Repeat step 5 until the L1 pairs are displayed. Click Change to replace
7.To create and split L2 cascade pairs, add the L2
a.Select the L1 pair from the list of pairs to be created and split.
70 Business Copy XP (BC) for the Array
b.Ensure that the L1 pairs are split (status = PSUS).
c.In the Select MU list, select the MU number (1 or 2) for the L2 pair to be created.
d.From the Pairsplit Volume List, select the volume to assign as the
e.Click Cascade to add the L2
f.To add another L2
8.Repeat step 7 until the pairs are displayed. Click Change to replace
9.When the Pairsplit window displays the L1 and L2 pairs, click OK to re???ect the settings to the Preset Volume list on the BC main screen.
10.In the BC main screen, click Apply to create and split the pairs.
When the pairsplit operations start, the BC main screen shows new pairs with COPY(SP) or PSUS(SP) status.
11. Click Refresh () to monitor the progress of the pairsplit operations.
Resynchronizing BC pairs (Pairresync)
The Pairresync window displays pair information for pairs selected on the BC main screen. Use the Pairresync window to resynchronize pairs. To open the Pairresync window, select one or more PSUS or PSUE pairs in the Volume list on the BC main screen,
Figure 36 Pairresync window
The Pairresync window consists of the following components.
Pairresync Volume List
The Volume List located on the upper side of the Pairresync window displays the following information about the
???Port: Port ID (cluster and channel number) of the
???Group
???(Path) LUN: CU:LDEV of the
NOTE:
An LDEV number ending with # (for example, 00:01#) indicates the LDEV is an external volume.
???MU: MU number of the
???Status: Status of the
???Port: Port ID (cluster and channel number) of the ???rst
???Group
???SvolMode (LUN(S)): CU:LDEV of the
NOTE:
An LDEV number ending with # (for example, 00:01#)indicates the LDEV is an external volume.
???Type: Emulation type of the
???Capacity (MB): Volume capacity displayed in megabytes (MB)
???CLPR(P): Cache logical partition of the
??? CLPR(S): Cache logical partition of the
Window options
???Use the Resync Type list to select the pairresync type for pairs being resynchronized (Normal Copy, Quick Resync, Reverse Copy, or Quick Restore).
???Use the Copy Pace list to select the copy pace (Slower, Medium, or Faster) for all pairs being resynchronized.
???The OK button adds the operation setting displayed in the Pairresync Volume List for resynchronizing the speci???ed pairs to the Preset List on the BC main screen.
NOTE:
You must click Apply on the BC main pane to start the pairresync operation for the speci???ed pairs.
???The Cancel button cancels operations set in the Pairresync window and closes the Pairsplit window.
???To remove any volumes from the Pairresync Volume List,
Resynchronizing one or more BC pairs
1.Unmount the split (PSUS)
2.In the BC main screen, select the port, host group, or
3.In the BC main screen, select the pairs to resync,
4.In the Pairresync window, select the pairs, and set the copy pace (Slower, Medium, or Faster) and resync type (Normal Copy, Quick Resync, Reverse Copy, or Quick Restore) for each pair. Reverse and quick restore pairresync cannot be performed on suspended pairs (PSUE) or L2 cascade pairs.
NOTE:
When a quick restore operation is in progress, the array management user interface may display old con???guration information. To update the information in the user interface, wait for the quick restore operation to ???nish, and click Refresh.
CAUTION:
Ensure that the correct resync direction (normal/quick, or reverse/quick restore) is selected.
72 Business Copy XP (BC) for the Array
CAUTION:
During the quick restore operation, the RAID levels, HDD types, and Cache LUN settings are swapped. To avoid performance impact due to quick restore operations:
???Ensure that the
???Because the Cache LUN settings are exchanged during a quick restore operation, you must perform one of the following operations. If you do not, the change of location of the cache residence areas may cause I/O performance to the Cache LUN data to be down.
???Set the same Cache LUN settings (locations) for the
???Release the Cache LUN settings of the
If you do not want to resynchronize the
5.Click OK. Repeat step 4 ??? step 5 until the Preset Volume list on the BC main screen displays the pairs (settings).
NOTE:
Ensure that the
6.In the BC main screen, click Apply to resync the speci???ed pairs.
The BC main screen displays the results of the pairresync operations (that is, the pair status changed to COPY(RS),
7.Click Refresh () to monitor the progress of the pairresync operations.
Suspending BC pairs
The
Figure 37
The
Suspending one or more BC pairs
1.In the BC main screen, click the port, host group, or
2.Select the pairs to suspend (or the volumes whose pairs you want to suspend),
3.In the
To remove the pairs from the list,
4.Repeat step 2 ??? step 3 to suspend additional pairs in the list.
5.In the BC main screen, click Apply to suspend the speci???ed pairs.
The BC main screen now displays the results of the
6.Click Refresh () to display the latest information.
Deleting BC pairs
The
Figure 38
The
Deleting one or more BC pairs
1.To synchronize the
a.Wait until all write I/Os to the
b.After the
c.When the pair status changes to PSUE, the
2.In the BC main screen, select the port, host group, or
3.Select the pairs to delete (or the volumes whose pairs you want to delete),
NOTE:
Pairs with PSUS(SP) status cannot be deleted. To remove pairs from the list,
4.In the
5.In the BC main screen, click Apply to delete the speci???ed pairs or volumes. The BC main screen now displays the results of the
6.Click Refresh () to display the latest information.
Viewing BC pair status and history
The History pane displays current BC pair status information and BC pair history information for the selected port. To open the History pane, click the History tab on the BC main screen.
74 Business Copy XP (BC) for the Array
Figure 39 History pane
NOTE:
If Snapshot XP is installed, the lower area of the pane lists the operation history of Snapshot XP pairs. For more information, see the HP StorageWorks Snapshot XP user guide.
The upper area of the History pane lists the operation history of BC pairs. The upper area of the History pane displays the following information:
???BC pair activity listed by date and time, LU information (port, host group ID, LUN) and volume ID (CU:LDEV) of the
NOTE:
The maximum number of records that can be listed in the History pane is 16,384.
??? The Refresh button () updates all information in the History pane.
If you perform an operation on a pair before the copy operation starts, the History pane will not display information about the operation.
You may need to wait for a while until the History pane displays operation history if the total number of the following pairs is 500 or more:
???BC pairs
???Snapshot XP pairs
???ShadowImage for z/OS pairs
???Hitachi?? FlashCopy?? Mirroring pairs
???Auto LUN XP pairs
???Flex Copy XP pairs
Even if the total number of pairs is less than 500, displaying operation history may take time when some of the pairs include LUSE volumes.
Table 22 BC pair activity codes, messages, and descriptions
Setting BC options
You can set the BC options by selecting and/or clearing the option check boxes on the Option screen. To display the Option screen, click the Option tab on the BC main screen.
Figure 40 Option screen
The Select Option box displays check boxes for the BC options.
76 Business Copy XP (BC) for the Array
NOTE:
More options will be supported in the future. See BC options for further information.
The Apply button applies the option settings in the Select Option box.
Setting a BC option (Swap&Freeze option)
1.In the BC main screen, click Option to display the Select Option box.
Select the option check box. If you do not want to set any option, clear all check boxes in the Select Option box.
2.Click Apply. You can now perform a BC operation with the speci???ed option.
BC error codes
BC displays error messages when error conditions occur during BC operations. The BC Error window displays the BC error code and message. To display the Error window, select the failed volume in the Preset Volume list on the BC main screen (Display tab),
Table 23 BC error codes
78 Business Copy XP (BC) for the Array
80 Business Copy XP (BC) for the Array
82 Business Copy XP (BC) for the Array
Index
A
access attributes copying, 49 license capacity, 51
setting with LUN Security XP Extension, 49
attributes copying, 49
license capacity, 51 resetting reserve, 62
setting with LUN Security XP Extension, 49 audience, 7
Auto LUN, combining with BC, 43
B
backward pairresync operation, 25 BC main screen, 53
C
Cache LUN, combining with BC, 43 cache maintenance, 15
cascade function, 23, 32 cascade pairs
access attributes, copying, 51 creating, 23, 32
de???ned, 13
MU numbers, 68 resynchronizing, 72
combining with other data management operations, 43
Command View XP management station, 13 components, 11
Continuous Access XP Journal, combining with BC, 43, 43
Continuous Access XP, combining with BC, 43, 46
conventions document, 8
Copy Pace list, 64, 68 Copy Threshold, 13 Copy threshold option, 13 COPY(PD) status
about, 40
operations available, 34 read/write operations, 35
COPY(RS) status about, 40
LUN Security XP Extension operations, 51 operations available, 34
LUN Security XP Extension operations, 51 operations available, 34
pairresync operation, 24 read/write operations, 35
COPY(SP) status about, 40
creating and splitting pairs, 70 operations available, 34 read/write operations, 35
creating and splitting pairs, 70
CVS operations, combining with BC, 43
D
deleting pairs
Display Filter window, 59 Display pane, 53 document
conventions, 8 prerequisites, 7
related documentation, 7 documentation
HP website, 7 providing feedback, 9
E
error codes, 77
External Storage XP, combining with BC, 43
F
forward pairresync operation, 25
H
help obtaining, 8
History pane, 74
host I/O performance, 32, 41, 42
HP
technical support, 8
I
I/O performance, 32, 41, 42
initial copy operation, 21 inqraid command, 16
L
L1 pairs, 33, 66
L2 pairs, 33, 67 LDEV maintenance, 15 leaf volume, 33
license capacity, LUN Security XP Extension, 51 LUN Security XP Extension
combining with BC, 49 license capacity, 51
LUN Security, combining with BC, 43 LUs, maximum number of pairs, 20, 20 LUSE operations
BC, combining with, 43
pairs, maximum number of, 20, 20
M
main screen, 53
MU numbers, 32, 64, 68
N
node volume, 33
normal pairresync operation, 25
O
OPEN volumes, differential tables, 17 operational requirements, 13 operations
overview of, 11 pair status and, 34
Option screen, 76
P
Detail window, 57 error codes, 77
forward pairresync operation, 25 initial copy operation, 21 license capacity, 51
LUN Security XP Extension, 49 paircreate operation, 21, 63 pairresync operation, 25, 71 pairs, maximum number of, 12 pairsplit operation, 23
requirements, 14 Swap&Freeze, 31
update copy operation, 22 Volume list, 54, 55
P.I.T. backups, 15 PAIR status
about, 40
operations available, 34 pairresync operation, 24 read/write operations, 35
pair status displaying, 38 error codes, 77 history, 74 icons, 54
L1 and L2, 34
power supply, switching off, 40 types of, 40
paircreate operation about, 21
Paircreate Volume List, 64 Paircreate window, 63 pairresync operation
84
pairs
Continuous Access XP Journal, 43 creating and splitting, 70 deleting, 31, 74
Detail window, 57
forward resynchronization, 25 initial copy operation, 21 license capacity, 51
LUN Security XP Extension, 49 maximum number of, 12
MU numbers, 32, 64, 68 requirements, 14 resynchronizing, 24, 71 settings, 54
Swap&Freeze option, 31 update copy operation, 22
pairsplit operation about, 23
Pairsplit Volume List, 67 Pairsplit window, 67
about, 30 pair status, 34 using, 73
about, 31 pair status, 34 using, 74
power supply, switching off, 40 preparing for operations, 42 prerequisites, 7
Preset Volume list, 54, 60 PSUE status
about, 40
LUN Security XP Extension operations, 51 operations available, 34
pairresync operation, 30 read/write operations, 35 resynchronizing pairs, 72
PSUS status about, 40
creating and splitting pairs, 70
LUN Security XP Extension operations, 51 operations available, 34
pairresync operation, 24, 30 read/write operations, 35 resynchronizing pairs, 72
PSUS(SP) status about, 40
creating and splitting pairs, 70 operations available, 34 read/write operations, 35
Q
quick pairresync operation, 25 quick restore operation, 31, 34
quick restore pairresync operation, 26 quick split operation, 68
R
RAID groups, 13, 14 RAID Manager
related documentation, 7 requirements, 13
reserve volumes, 21, 61, 62
reset reserve attribute operation, 21 Reset Reserve Attribute window, 62 resynchronizing pairs
pairresync operation, 71 Swap&Freeze, 31
resynchronizing
reverse pairresync operation, 26, 34 root volume, 33
S
Continuous Access XP, 46 Continuous Access XP Journal, 43 creating and splitting pairs, 70 data copying operations, 12 de???ned, 11
Detail window, 57 error codes, 77
forward pairresync operation, 25 initial copy operation, 21 license capacity, 51
LUN Security XP Extension, 49 paircreate operation, 21, 63 pairresync operation, 25, 71 pairs, maximum number of, 12 pairsplit operation, 23
preparing for BC operations, 42 RAID groups, 13
requirements, 14 reserving, 61 Select box, 68 Select list, 65
set reserve attribute operation, 21 Swap&Freeze, 31
update copy operation, 22 Volume list, 54, 55
Select MU list, 64, 68 Select
set reserve attribute operation, 21 Set Reserve Attribute window, 61 SMPL status
about, 40
creating and splitting pairs, 70 speed
copy pace, 64, 68 copy processing time, 41
splitting
cascade pairs, 33 pairsplit operation, 70 using Pairsplit window, 67
starting operations, 52 status
error codes, 77 history, 74 icons, 54
power supply, switching off, 40 steady split operation, 68 Subscriber's Choice, HP, 9 suspending pairs
T
technical support HP, 8
service locator website, 9 Tree View, 53 troubleshooting
U
unreserving volumes, 62 update copy operation, 22
V
VMAs (Volume Management Areas), 49, 51 Volume list, 54, 55
volumes for BC operations, 42
W
websites HP , 9
86