HP StorageWorks Business Copy XP user guide for the XP12000/XP10000/SVS200 Part number: T1713-96007 Fifth edition: March 2007
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Contents About this guide . . . . . . . . . . . . . . . . . . . . . . . . . . Intended audience . . . . . . . Prerequisites . . . . . . . . . Related documentation . . . . . Document conventions and symbols HP technical support . . . . . . Subscription service . . . . . . HP websites . . . . . . . . . . Documentation feedback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starting BC . . . . . . . . . . . . . . . . . . . . . . BC main screen . . . . . . . . . . . . . . . . . . Volume list . . . . . . . . . . . . . . . . . . Detail window . . . . . . . . . . . . . . . . . S-Vol Path window . . . . . . . . . . . . . . . Display Filter window . . . . . . . . . . . . . Preset Volume list . . . . . . . . . . . . . . . Performing BC operations . . . . . . . . . . . . . . . . Setting reserve attributes . . . . . . . . . . . . . .
Figures 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 ..BC overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..Adding a pair in BC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..Update copy operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..Normal and quick pairresync operations . . . . . . . . . . . . . . . . . . . . . . ..Reverse and quick restore pair operations . . . . . . . . .
Tables 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 6 ..Document conventions . . . . . . . . . . . . . . . . . . . . . . ..BC operational requirements for the array . . . . . . . . . . . . . ..Total number of differential tables per pair . . . . . . . . . . . . . ..Number of control cylinders according to emulation types . . . . . . ..Relationship between emulation type, capacity, and differential tables . ..Number of differential tables used in OPEN-V . . . . . . . . . . . ..
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 HP-authorized service providers with knowledge of: • Disk array hardware and software • Data processing and RAID storage subsystems and their basic functionsand utilities Prerequisite
Document conventions and symbols Table 1 Document conventions Convention Element Blue text: Table 1 Cross-reference links and e-mail addresses Blue, underlined text: http://www.hp.
• Detailed questions Subscription service HP recommends that you register your product at the Subscriber's Choice for Business website: http://www.hp.com/go/e-updates After registering, you will receive e-mail notification of product enhancements, new driver versions, firmware updates, and other product resources. 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.
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.
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 P-VOL (primary volume), and a volume to which data is copied is called an S-VOL (secondary volume). Pairs of P-VOLs and S-VOLs made by BC are called BC pairs. You can specify an S-VOL as a P-VOL to make another two BC pairs. As a result, you can use BC to make a total of nine S-VOLs.
differential data in the P-VOL (due to P-VOL and S-VOL updates) is copied to the S-VOL, so the S-VOL is again identical to the P-VOL. For reverse resync, the differential data in the S-VOL (due to P-VOL and S-VOL updates) is copied to the P-VOL, so the P-VOL is now identical to the S-VOL. NOTE: BC S-VOLs are updated asynchronously. For a volume pair with PAIR status, the P-VOL and S-VOL may not be identical. For further information on BC update copy operations, see Paircreate operation.
Table 2 BC operational requirements for the array Parameter Requirement Pair objects Logical devices (LDEVs): OPEN-x (such as OPEN-3, OPEN-9, OPEN-E, and OPEN-V), including CVS and LUSE volumes. Devices must be installed and configured. The P-VOL and S-VOL must be the same type (for example, OPEN-3 to OPEN-3 is allowed, OPEN-3 to OPEN-9 is not allowed). A custom size P-VOL must be paired with S-VOLs of the same type and capacity. A LUSE P-VOL must be paired with S-VOLs of the same size and structure.
Parameter Requirement Physical device (PDEV) maintenance Maintenance of a PDEV that is not used by BC does not affect BC operations or the status of BC pairs. If a PDEV contains LDEVs used by BC, you can maintain that PDEV independently of the BC operations and pair status. Logical device (LDEV) maintenance If the status of a BC pair is COPY(PD), PAIR, PSUS, PSUS(SP), COPY(SP), COPY(RS), or COPY(RS-R), maintenance for the LDEVs used by that pair is restricted.
• • • • 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”.
Table 3 Total number of differential tables per pair Emulation type Equation OPEN-3 Total number of differential tables per pair = [(X ÷ 48) + (Y x 15)] ÷ Z • (X): Volume capacity (KB) 1, 2 • (Y): Number of control cylinders associated with the emulation type (see Table 4) • (Z): Number of slots that can be managed by a differential table (61,312) OPEN-8 OPEN-9 OPEN-E NOTE: OPEN-L Round the result of the calculation up to the nearest whole number.
Table 5 Relationship between emulation type, capacity, and differential tables Emulation type Capacity1 Differential tables per pair OPEN-3 Does not depend on capacity 1 OPEN-9 Up to 2.7GB 1 Up to 5.5GB 2 Up to 6.8GB 3 Up to 2.7GB 1 Up to 5.5GB 2 Up to 8.4GB 3 Up to 11.2GB 4 Up to 13.5GB 5 OPEN-L 33.
Capacity1 Differential tables Capacity1 Differential tables Capacity1 Differential tables Up to 344.2GB 23 Up to 823.2GB 55 Up to 1,302.2GB 87 Up to 359.2GB 24 Up to 838.2GB 56 Up to 1,317.2GB 88 Up to 374.2GB 25 Up to 853.2GB 57 Up to 1,332.2GB 89 Up to 389.1GB 26 Up to 868.1GB 58 Up to 1,347.1GB 90 Up to 404.1GB 27 Up to 883.1GB 59 Up to 1,362.1GB 91 Up to 419.1GB 28 Up to 898.1GB 60 Up to 1,377.1GB 92 Up to 434.0GB 29 Up to 913.0GB 61 Up to 1,392.
Capacity1 Differential tables Capacity1 Differential tables Capacity1 Differential tables Up to 1,856.1GB 124 Up to 2,350.0GB 157 Up to 2,844.0GB 190 Up to 1,871.0GB 125 Up to 2,365.0GB 158 Up to 2,859.0GB 191 Up to 1,886.0GB 126 Up to 2,380.0GB 159 Up to 2,873.9GB 192 Up to 1,901.0GB 127 Up to 2,394.9GB 160 Up to 2,880.0GB 193 Up to 1,915.9GB 128 Up to 2,409.9GB 161 Up to 1,930.9GB 129 Up to 2,424.
• (Β) = 30,718 when additional shared memory for differential tables is installed. For example, if you create 10 pairs of LUSE volumes consisting of three OPEN-3 volumes, use the following equation: (1 x 3) x 10 = 30 ≤ 13,652 Since 30 is less than 13,652, 10 pairs of LUSE volumes consisting of three OPEN-3 volumes can be created. NOTE: When the emulation type is OPEN-3, and the capacity of the volume is 2,403,360 KB, the number of differential tables required for a pair is 1.
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 P-VOL during the initial copy operation are duplicated at the S-VOL by update copy operations after the initial copy is complete. CAUTION: Even if a copy operation is completed without any host I/O, the data in the P-VOL and S-VOL may not be identical.
CAUTION: Even if a copy operation is completed without any host I/O, the data in the P-VOL and S-VOL may not be identical. Whether the P-VOL and the S-VOL have the same data depends on the condition of the disk array. To make the P-VOL and S-VOL data the same, split the pair and make the pair status PSUS.
new pair, all P-VOL data is copied to the S-VOL. When the split operation is complete, the pair status changes to PSUS, and you have full read/write access to the split S-VOL (even though it is still reserved). While the pair is split, the disk array establishes a track map for the split P-VOL and S-VOL, and records a list of the changed tracks for both volumes. The P-VOL remains fully accessible during the pairsplit operation, and the accessibility of the S-VOL depends on the split type (see Split type).
Forward pairresync operation A forward pairresync operation resynchronizes pairs by copying data on P-VOLs to S-VOLs. The following are the types of forward pairresync operations: • Normal. This operation (see Figure 4) resynchronizes the S-VOL with the P-VOL. The copy direction for a normal pairresync operation is P-VOL to S-VOL. The pair status during a normal resync operation is COPY(RS), and the P-VOL remains accessible to all hosts for read and write operations during a normal pairresync. • Quick.
• Reverse. This operation (see Figure 5) synchronizes the P-VOL with the S-VOL. The copy direction for a reverse pairresync operation is S-VOL to P-VOL. Table 7 shows the requirements for reverse and quick restore pairresync operations. If you perform these operations on pairs that do not meet the requirements, the reverse copy or quick restore command is rejected.
Figure 5 Reverse and quick restore pair operations NOTE: The P-VOL remains read-enabled during the quick restore operation only to enable the host to recognize the volume. Data on the P-VOL is not guaranteed until the quick restore operation is complete and the status changes to PAIR. NOTE: When a quick restore operation is in progress, the array management user interface may display old configuration information.
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 P-VOL and S-VOL before performing the quick restore operation.
Figure 6 BC P-VOL forming pair with Continuous Access XP S-VOL and external S-VOL, respectively Figure 7 BC P-VOL forming pair with external S-VOL and shared as Continuous Access XP S-VOL Figure 8 BC S-VOL forming pair with external P-VOL and shared as Continuous Access XP P-VOL Figure 9 BC P-VOL forming pair with CA XP Jou. S-VOL and Ext.
status changes to PAIR. The disk array resumes BC update copy operations after the pair status changes to PAIR. The P-VOL remains fully accessible during a normal pairresync operation, but becomes inaccessible to all hosts during a reverse or quick restore pairresync operation. This ensures that data on the P-VOL is identical to data on the S-VOL when the reverse or quick restore pairresync operation completes.
Use the Pairsplit-E window to suspend BC pairs. When a pair is suspended, the status changes to PSUE. When the pairresync operation starts, the pair status changes to COPY(RS). The P-VOL remains fully accessible while suspended and during the pairresync operation. Pairsplit-S operation (delete) This operation stops BC copy operations to the S-VOL of the pair and changes the pair status of both volumes to SMPL. The volumes are not deleted.
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 P-VOL and S-VOL. If you use the Swap&Freeze option when performing the Quick Restore pairresync operation, the update copy operation will not take place after the Quick Restore pairresync operation is complete. Therefore, data on the P-VOL and S-VOL is kept exchanged.
For Level 1 (L1) pairs, the root volume could have MU=0, MU=1, and MU=2. For L1 pairs, the associated S-VOLs all have MU=0 because this is the first pair of which they are a member. For the Level 2 (L2) pairs, the L1 S-VOLs are now all acting as L2 P-VOLs. Because they are already a member of one pair, the next MU number for each of them is MU=1 for their first L2 pair and MU=2 for their second L2 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 (S-VOLs). • When a P-VOL is paired with more than one S-VOL, the disk array assumes there are the same number of virtual P-VOLs. For example, when a P-VOL is paired with three S-VOLs, there is only one real P-VOL, but the disk array assumes there are three virtual P-VOLs. A Virtual P-VOL is called an MU (Mirror Unit).
Table 10 Relationship between L2 pair status and L1 pair operations L2 Pair Status L1 Pair Operations Paircreate Pairsplit Pairresync Reverse/ Quick Restore Pairsplit-E Pairsplit-S COPY(PD) OK1, 2 OK OK OK OK OK PAIR OK1, 2 OK OK OK OK OK COPY(SP) NO2 (CMD RJT) NO2 (CMD RJT) NO (CMD RJT) NO (CMD RJT) OK OK PSUS(SP) NO2 (CMD RJT) NO2 (CMD RJT) NO (CMD RJT) NO (CMD RJT) OK OK PSUS OK1, 2 OK OK OK OK OK COPY(RS) OK1, 2 OK OK OK OK OK COPY(RS-R) NO2 (CMD RJT) N
Table 12 Read/write operation (host to the leaf volume) and L2 pair status L2 Pair Status COPY Read Only PAIR COPY(SP) PSUS(SP)/ PSUS COPY(RS) PSUE Read Only Read Only Read/Write Read Only Read Only At-Time Split function 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.
Figure 13 Overview of At-Time Split function Enabling the At-Time Split function using RAID Manager 1. Create BC At-Time Split pairs as follows: a. Define a consistency group for BC pairs. You cannot define 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 At-Time Split option. c. Execute the paircreate command. 2.
NOTE: After the pairsplit, response time of the first I/O to each logical unit (LU) can be up to approximately five seconds in the worst case. This worst case should be in a one-to-three BC pair situation and 36 LDEV LUSE configuration. Pair status The BC remote console software displays the pair status of all BC volumes (LUs) on the specified port of the connected disk array. The following figure shows the BC pair status transitions and the relationship between pair status and BC operations.
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 S-VOL.
Table 13 BC pair status conditions Pair Status Description S-VOL Access SMPL The volume is not assigned to a BC pair. The disk array accepts read and write I/Os for all SMPL volumes that are not reserved. N/A (there is no S-VOL yet). COPY(PD) The initial copy operation is in progress. The disk array continues to accept read and write operations for the P-VOL, but stops accepting write operations for the S-VOL. No update copy operations are performed. Read only.
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 At-Time Split function may not resume when you switch on the power supply, and the status of some pairs may remain unchanged. • Establish a timetable for BC copying operations.
• Command View XP management station (user-supplied Windows-based PC) or XP Remote Web Console. • 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 S-VOLs. If you have not already done so, consider the relative importance of the disk array's I/O performance and the BC backup copies.
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 P-VOL and S-VOL have the same LU type and number of LDEVs (same size). If you must perform LUSE operations on an existing BC P-VOL or S-VOL, delete the pair first to return the volume to SMPL status. • CVS. CVS volumes can be assigned to BC pairs if the S-VOL has the same capacity as the P-VOL.
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 (P-VOL) of Continuous Access XP Journal means a primary data volume of Continuous Access XP Journal. A secondary volume (S-VOL) of Continuous Access XP Journal means a secondary data volume of Continuous Access XP Journal. • Combining BC L1 and L2 pairs with Continuous Access XP Journal volumes is allowed.
Figure 16 BC and Continuous Access XP Journal: Shared P-VOL and S-VOL Figure 17 is an example of a volume that functions as both a Continuous Access XP Journal P-VOL and a BC P-VOL, while the S-VOL of the same Continuous Access XP Journal pair also functions as the P-VOL of another BC pair.
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 intra-disk array copy operations. If BC is not installed, use Continuous Access XP (synchronous only) to copy within the same local disk array. This Continuous Access XP configuration requires at least one external ESCON® cable loop (minimum of two is recommended).
Figure 19 BC and Continuous Access XP: shared P-VOL/S-VOL CAUTION: When you share a BC P-VOL with a Continuous Access XP S-VOL as shown in Figure 19, the write operation to the Continuous Access XP P-VOL takes time. Especially, when the BC pair is in the PSUS(SP) status, the write operation to the Continuous Access XP P-VOL may take extra time due to the time for copying to the BC pair.
Figure 21 BC and Continuous Access XP: shared S-VOL/P-VOL 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.
Figure 23 BC, Continuous Access XP, and Continuous Access XP Journal: Shared S-VOL/P-VOL/S-VOL 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 S-VOL Disable attribute as an S-VOL. Table 15 shows whether you can specify the volume with access attribute as a P-VOL or S-VOL of a BC pair.
Table 17 VMA setting and availability of Paircreate operation P-VOL S-VOL Volume without VMA Volume with VMA Volume without VMA OK NO Volume with VMA NO OK 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 P-VOL and S-VOL must have VMA.
CAUTION: Because the S-VOL's access attribute is changed after copying the P-VOL's access attribute, be careful about access attributes of volumes to be specified as BC pairs. For example, if the P-VOL's access attribute is S-VOL Disable, the S-VOL's access attribute is also S-VOL Disable after copying the access attribute. You cannot perform Pairresync operations on the S-VOL that has the S-VOL Disable access attribute. You must change the access attribute to something other than S-VOL Disable.
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.
Figure 26 BC main screen You can now perform BC operations. You first need to reserve the volumes you plan to use as BC S-VOLs (see Setting reserve attributes for instructions). You can then start adding BC pairs (see Creating BC pairs (Paircreate) for instructions). 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.
NOTE: You can filter volumes or volume pairs displayed in the Volume list on the upper-right side of the Display tab by selecting a port, host group, or volume (P-VOL). To display all volumes and pairs, select Port (Subsystem) at the top of the Tree View box. • The Volume list on the upper-right of the Display pane shows all available volumes on the port, host group, or P-VOL selected in the Tree View box.
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.
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, double-click the corresponding S-VOL in the Volume list. • G-ID: Host group of each volume. • LUN: CU:LDEV (control unit image:logical device ID) of each volume.
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. Pairsplit-E: Suspends BC pairs. Pairsplit-S: Deletes BC pairs. Change Reserve: Sets and resets the BC reserve attribute.
Figure 28 Detail window S-Vol Path window This window displays information on the selected pair (all paths defined for the S-VOL). To open the S-Vol Path window, select one or more pairs in the Volume list, right-click, and select S-Vol Path. Figure 29 S-Vol Path window NOTE: The S-Vol Path command is not available when selecting SMPL volumes.
Display Filter window This window filters 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, right-click, and select Display Filter. Figure 30 Display Filter window (BC tab selected) The Display Filter window (BC tab selected) has the following features: • CLPR: Displays the specified cache logical partition (CLPR).
• 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.
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 specified option in the Preset Volume list is performed by clicking Apply, but the operation fails, the reason code is displayed. To perform the specified operations, click Apply on the BC main screen.
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 Non-Pair check box, and click OK. 4. Select the volumes, right-click, and select Change Reserve. The Set Reserve Attribute window appears. If the Change Reserve command is not enabled, you selected paired volumes.
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, right-click, and select Change Reserve. The Reset Reserve Attribute window appears. If the Change Reserve command is not enabled, you selected paired volumes. Select only reserved and unpaired volumes. 5.
• Select S-Vol box • Buttons • Creating L1 pairs Paircreate Volume List The Volume List in the upper half of the Paircreate window displays the following information about the P-VOL and S-VOL used for creating a pair: NOTE: The S-VOL for each P-VOL is displayed only after being selected (using Set or Change). • Port: Port ID (cluster and channel number) of the P-VOL. • G-ID: Host group ID of the P-VOL. • LUN: CU:LDEV of the P-VOL.
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 P-VOL (root or node volume). Select S-Vol box This box filters S-VOLs displayed in the S-VOL list. • Port list: Displays available S-VOLs by port. • Volume Type: • Internal Vol: Select available S-VOLs that are internal volumes. • External Vol: Select available S-VOLs that are external volumes. NOTE: You can select external volumes only when External Storage XP is available.
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 S-VOL List, select the volumes, right-click the selected volumes, and select Delete.
CAUTION: The L2 paircreate operation overwrites all existing data on the L2 S-VOLs. You are responsible for backing up the data on the S-VOLs before creating BC pairs. Creating L2 pairs 1. Ensure that the L2 S-VOLs are unmounted. 2. In the BC main screen, select the L1 pairs to which you want to add the L2 pairs, right-click the selected L1 pairs, and select Paircreate. The Paircreate window appears. 3.
NOTE: An LDEV number ending with # (for example, 00:01#) indicates the LDEV is an external volume. • • • • • MU: MU number of the P-VOL Status: Status of the P-VOL Port: Port ID (cluster and channel number) of the first S-VOL of each volume pair Group (G-ID): Host group ID of the S-VOL SvolMode (LUN(S)): CU:LDEV of the S-VOL NOTE: An LDEV number ending with # (for example, 00:01#) indicates the LDEV is an external volume.
NOTE: The number of secondary volumes that can be displayed in the S-VOL List at one time is limited to 1,024. If the number of volumes defined in the disk array exceeds this limit, use the Previous and Next buttons on the upper right of the S-VOL List to turn the pages of the S-VOL List and see the entire list. • Previous button: Returns to the previous page of the S-VOL List.
2. In the BC main screen, select the port, host group, or P-VOL in the Tree View box to filter the volumes displayed in the Volume list. 3. Select the pairs you want to split, right-click the selected P-VOLs, and select Pairsplit. The Pairsplit window appears. You cannot split a suspended (PSUE) pair. 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.
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 S-VOL for the L2 pair. e. Click Cascade to add the L2 S-VOL to the selected L1 pair. The new L2 pair is now displayed. f. To add another L2 S-VOL to the same L1 pair, repeat step 7b — step 7e. Each L2 pair to be created and split is displayed separately in the list of pairs. 8.
• CLPR(S): Cache logical partition of the S-VOL 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 specified pairs to the Preset List on the BC main screen.
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 P-VOL and S-VOL have the same RAID level and HDD type before performing the quick restore operation. To restore the original RAID levels after quick restore, stop host I/Os to the pair, split the pair, perform the quick restore operation for that pair again, and restart host I/Os to the pair.
4. Repeat step 2 — step 3 to suspend additional pairs in the list. 5. In the BC main screen, click Apply to suspend the specified pairs. The BC main screen now displays the results of the pairsplit-E operations (that is, pair status changed to PSUE). 6. Click Refresh () to display the latest information. Deleting BC pairs (Pairsplit-S) The Pairsplit-S window displays pair information for pairs selected on the BC main screen. Use the Pairsplit-S window to delete pairs.
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.
Table 22 BC pair activity codes, messages, and descriptions Code Message Description 4710 - 471F PAIR START BC initial copy operation started. 4720 - 472F PAIR END BC initial copy operation ended, and pair status changed to PAIR. 4730 - 473F PSUS START BC pairsplit operation started, and pair status changed to COPY(SP) or PSUS(SP). 4740 - 474F PSUS END BC pairsplit operation ended, and pair status changed to PSUS.
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 specified option.
Error Code Description Corrective Action 0818 The Pairresync or Pairsplit-E command cannot be issued because a path group is set. Unmount the S-VOL (offline from the host), or delete Continuous Access XP path. 081F Command Reject. P-VOL is used from HOST or by CA. Disconnect from host, or cancel Continuous Access XP path. 0830 A pair cannot be created because the track format is different. Ensure that the emulation type of the P-VOL and S-VOL is the same.
Error Code Description Corrective Action 1004 Logical contradiction. Call HP technical support for assistance. 1005 Logical contradiction. Call HP technical support for assistance. 1007 Logical contradiction. Call HP technical support for assistance. 1009 The number of BC pairs exceeded the maximum. Delete some of the pairs. 1010 Logical contradiction. Call HP technical support for assistance.
Error Code Description Corrective Action 1033 The specified P-VOL is not really a P-VOL. Check pair status. 1037 The specified P-VOL has been set as a BC S-VOL. Check pair status. 103A The Pairresync command was issued to a device in the SMPL status. Check pair status. 103B It is impossible to make a pair because volume that was specified as S-VOL is root volume already. Confirm a pair condition.
Error Code Description Corrective Action 1071 The status classification (statusindc) in the Status Check command is incorrect. Call HP technical support for assistance. 1072 The CU number specified by the Status Check command (volume status) does not exist. Call HP technical support for assistance. 1084 Volume was used for reserve volume of HIHSM. Check the volume, or cancel the reserve volume of HIHSM. 1085 P-VOL was used for reserve volume of HIHSM.
Business Copy XP (BC) for the Array
Index A access attributes copying, 49 license capacity, 51 setting with LUN Security XP Extension, 49 At-Time Split function, 36 attributes copying, 49 license capacity, 51 resetting reserve, 62 setting with LUN Security XP Extension, 49 audience, 7 Auto LUN, combining with BC, 43 COPY(RS-R) status about, 40 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
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 ta
pairs At-Time Split function, 36 backward resynchronization, 25 cascade, 13, 23, 32 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 status, 38 suspending, 30, 73 Swap&Freeze option, 31 update copy operation, 22 pairsplit operation about, 23 pair status, 34 u
S-VOLs At-Time Split function, 36 backward pairresync operation, 25 cascade function, 32 Continuous Access XP, 46 Continuous Access XP Journal, 43 creating and splitting pairs, 70 data copying operations, 12 defined, 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 pairsplit-E (suspend) operation, 30,
