HP StorageWorks Business Copy XP user guide for the XP10000/XP12000 Part number: T1713-96002 Second edition: December 2005
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Contents About this guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Intended audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Prerequisites. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Firmware versions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Related documentation . . . . . . . . . . . . . .
Combining BC with LUN Security XP Extension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Copying access attributes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . License capacity of LUN Security XP Extension. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Starting BC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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 Tables 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Adding a pair in BC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Update copy operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Normal and quick pairresync operations . . . . . . . . . . . . . . . . . . . . .
19 20 21 22 23 24 25 26 27 28 6 VMA setting and availability of Paircreate operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 Pair status and availability of LUN Security XP Extension operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 BC tree icons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 Status icons for BC. . . . . . . . . . . . . . . . . . . . . . . . . . . .
About this guide This guide provides information about the following: • ”Overview of BC operations” on page 11” • ”Preparing for BC operations” on page 39 • ”Starting BC” on page 48 • ”Performing BC operations” on page 57 • ”BC error codes” on page 73 Intended audience This guide is intended for customers and HP-authorized service providers with knowledge of the following: • Disk array hardware and software • Data processing and RAID storage subsystems and their basic functions Prerequisites Prerequisites
Document conventions and symbols Table 2 Document conventions Convention Element Blue text: Table 1 Cross-reference links and e-mail addresses Blue, underlined text: (http://www.hp.
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1 Business Copy XP (BC) for the XP10000/XP12000 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.
• ”BC software on the Command View XP management station” on page 13 Figure 1 BC overview Use BC from the Command View XP management station or XP Remote Web Console to copy volumes in the local disk array. 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.
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” on page 21.
BC requirements for XP12000 and XP10000 BC operations provide disk array-internal copies of UNIX/PC server volumes (LUs) on the disk array. The following table describes the operational requirements for BC. Table 3 BC operational requirements for XP12000 and XP10000 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.
Table 3 BC operational requirements for XP12000 and XP10000 (continued) Parameter Requirement Dynamic sparing and If a failure occurs requiring the disk array to utilize dynamic sparing or automatic automatic correction copy correction copy, the status of the paired volumes associated with the failed physical device is not affected. 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.
• 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” on page 79. • For Auto LUN XP, see ”Calculating the number of Auto LUN XP concurrent migration plans” on page 80.
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 4 to calculate the total number of differential tables per pair.
Table 6 shows the relationship between emulation type, capacity, and differential tables. Table 7 shows the number of differential tables used in OPEN-V. Table 6 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 33.
Table 7 Number of differential tables used in OPEN-V (continued) Capacity1 Differential tables Capacity1 Differential tables Capacity1 Differential tables Up to 314.3GB 21 Up to 793.3GB 53 Up to 1,272.3GB 85 Up to 329.3GB 22 Up to 803.3GB 54 Up to 1,287.3GB 86 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.
Table 7 Number of differential tables used in OPEN-V (continued) Capacity1 Differential tables Capacity1 Differential tables Capacity1 Differential tables Up to 1,811.2GB 121 Up to 2,305.1GB 154 Up to 2,799.1GB 187 Up to 1,826.1GB 122 Up to 2,320.1GB 155 Up to 2,814.1GB 188 Up to 1,841.1GB 123 Up to 2,335.1GB 156 Up to 2,829.0GB 189 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.
• ( β ) = 13,652 when additional shared memory for differential tables is not installed. • ( 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 × 3 ) × 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.
CAUTION: If a copy operation is completed without any host I/O, the data in the P-VOL and S-VOL may not be the same. 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. NOTE: When creating pairs, you can select the pace for the initial copy operation: slower, medium, and faster.
• If shared memory is lost (for example, offline micro exchange or volatile PS on), the differential bitmap is also lost. In this case, the disk array treats the entire BC P-VOL (S-VOL for COPY(RS) pairs) as difference data and recopies all data to the S-VOL (P-VOL for COPY(RS) pairs) to ensure proper pair resynchronization. For pairs with COPY(SP) or PSUS(SP) status, the disk array changes the status to PSUE due to the loss of the differential bitmap, also ensuring proper resynchronization of these pairs.
want to finish the copy operation quickly in order to access the S-VOL, take the P-VOL offline before performing the operation. NOTE: Refer to the Table 8 for information about read/write operations from host servers to P-VOLS and S-VOLS of BC pairs during a pairsplit operation. Table 8 Read/write operations during pairsplit operations Operations Volumes Quick Split Read P-VOL All data can be read S-VOL The areas that are already copied can be read.
• 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. This operation speeds up the normal pairresync operation without copying the P-VOL data to the S-VOL.
NOTE: The P-VOL remains read-enabled during the reverse pairresync operation only to enable the host to recognize the volume. Data on the P-VOL is not guaranteed until the reverse pairresync operation is complete and the status changes to PAIR. • 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 P-VOL and S-VOL without copying the S-VOL data to the P-VOL.
CAUTION: During a quick restore operation, the RAID levels, HDD types, and Cache LUN settings of the P-VOL and S-VOL are exchanged. For example, if the P-VOL has a RAID-1 level and the S-VOL has a RAID-5 level, the quick restore operation changes the P-VOL to RAID-5 and the S-VOL to RAID-1. This also applies to RAID-6 volumes. To avoid any performance impact due to the quick restore operation 1.
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 P-VOL (pairsplit-S and pairsplit-E are allowed).
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 flagged tracks from the P-VOL to the S-VOL.
Use the Pairsplit-S window (see ”Deleting BC pairs (Pairsplit-S)” on page 69) to delete BC pairs. When a BC pair is deleted, pending update copy operations for the pair are discarded, and the status of the P-VOL and S-VOL is changed to SMPL. CAUTION: The S-VOL of a duplex pair (PAIR status) may not be identical to its P-VOL due to the asynchronous BC update copy operations. See ”Deleting BC pairs (Pairsplit-S)” on page 69 for instructions on synchronizing the volumes before deleting the pair.
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.
their second L2 pair. For the S-VOLs associated with each of these pairs, the MU number is once again MU=0 because this is the first pair of which they are a member. Figure 12 Cascade pairs When L1 and L2 cascade pairs are created, the P-VOLs and S-VOLs of the cascade pairs are classified using the following terms (as shown in the previous figure): • The root volume is the P-VOL of the L1 pair, which is the original BC pair. You can add up to three S-VOLs (node volumes) to a root volume.
• “MU#” in Figure 12 means MU number, which identifies each MU. MU#=1 under S-VOL1 means the MU number of the P-VOL that is paired with the S-VOL1 is 1.
to the root volume regardless of the status of L1/L2 pairs. Table 13 shows the relationship between read/write operations from host to node volume and status of L1/L2 pairs. Table 14 shows the relationship between read/write operations from host to leaf volume and L2 pair status.
When the At-Time Split function is enabled, data in all P-VOLs in the same consistency group is copied to the corresponding S-VOLs when the disk array receives the pairsplit request from the host server. The following figure shows an overview of the At-Time Split function. 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.
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.
complete, the pair status changes to PSUS and you can access the split S-VOL. The update copy operation is not performed on pairs with status of PSUS. • If the disk array cannot maintain PAIR status for any reason or if you suspend the pair (pairsplit-E), the pair status changes to PSUE. NOTE: • When you specify reverse or quick restore mode for a pairresync operation, the pair status changes to COPY(RS-R) (data is copied in the reverse direction from the S-VOL to the P-VOL).
Table 15 BC pair status conditions (continued) Pair Status Description S-VOL Access COPY(RS-R) The disk array does not accept write I/Os for COPY(RS-R) S-VOLs. When a split pair is resynchronized in reverse or quick restore mode, the disk array copies only the S-VOL differential data to the P-VOL. No update copy operations are performed during the reverse or quick restore pairresync operation. Read only.
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 (user-supplied Windows-based PC) or XP Remote Web Console. • BC license key installed.
Table 16 CU Identifying the volumes for BC operations (continued) Port TID: LUN L1 P-VOL Assoc. L1 S-VOLs L1 S-VOL Assoc. L1 P-VOL L2 P-VOL Assoc. L2 S-VOLs L2 S-VOL Assoc. L2 P-VOL 0 3A 0:00 No — No — No — Yes 1B-0:00 0 3A 0:01 No — No — No — Yes 1B-0:00 etc. Combining BC with other data management operations BC supports concurrent operations with the following data management functions: • LU Size Expansion (LUSE).
• 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.
• Use BC to provide on-site backup copies of Continuous Access XP Journal P-VOLs and S-VOLs • Use Continuous Access XP Journal to provide remote backup of BC P-VOLs Figure 17 BC and Continuous Access XP Journal: Shared P-VOL and P-VOL and P-VOL and S-VOL 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.
• Use Continuous Access XP to provide remote backup copies of BC P-VOLs Figure 18 BC and Continuous Access XP: shared P-VOL/P-VOL The configuration shown in Figure 19 is an example of a volume functioning as both a Continuous Access XP S-VOL and BC P-VOL. With this configuration, you can use BC to provide remote copies of Continuous Access XP S-VOLs.
NOTE: This configuration does not allow BC and Continuous Access XP to copy at the same time. Create the BC pair first, 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 S-VOL/P-VOL Usually Continuous Access XP and Continuous Access XP Journal can share volumes with BC.
Figure 23 is an example of a volume functioning as both a Continuous Access XP S-VOL and a Continuous Access XP Journal P-VOL. In this configuration, you cannot use this volume as the P-VOL of a BC pair. 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.
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 P-VOL’s VMA to the S-VOL. Table 19 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.
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.
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. 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” on page 57 for instructions). You can then start adding BC pairs (see ”Creating BC pairs (Paircreate)” on page 58 for instructions).
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.
• 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.
• 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. 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.
• S-Vol Path: Displays the S-VOL’s port, group, and path (LUN) of the selected pair. • Display Filter: Filters volumes displayed in the Volume list. Clicking Display Filter is another method of accessing this command.
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.
• 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.
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 specified operations: • Port: Port ID (cluster and channel number) of each volume. If L2 pairs exist, a different icon displays. • Group (G-ID): Host group of each volume.
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, right-click, and click Change Reserve. Figure 32 Set Reserve Attribute window The Set Reserve Attribute window displays unreserved volumes selected on the BC main screen.
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, right-click, and click Change Reserve. Figure 33 Reset Reserve Attribute window The Reset Reserve Attribute window displays the reserved volumes selected on the BC main screen.
start the paircreate operations. To open the Paircreate window, select one or more SMPL volumes or PSUS pairs in the Volume list on the BC main screen, right-click the selected volumes, and select Paircreate.
• 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. • Type: Emulation type of the P-VOL and S-VOL. • Capacity (MB): Volume capacity displayed in megabytes (MB). • CLPR(P): Cache logical partition of the P-VOL. • CLPR(S): Cache logical partition of the S-VOL. Copy Pace list Use the Copy Pace list to select the copy pace for all pairs being created: Slower, Medium, and Faster.
displayed on one page. The button is unavailable if the total number of volumes defined in the disk array is less than 1,024 volumes. • S-VOL List: Displays the following information related to S-VOLs: • Port: Port ID (cluster and channel number) of the S-VOL. • Group (G-ID): Host group ID of the S-VOL. • S-Vol Path (LUN): CU:LDEV of the S-VOL. • Pair Num: Number of pairs. • Type: Emulation type of the S-VOL. • Capacity (MB): Capacity of the S-VOL in megabytes (MB).
d. Click Set to create (add) the S-VOL to the selected P-VOL. The S-VOL is displayed next to the selected P-VOL. e. To add a second and third S-VOL to the same P-VOL, repeat step 6b - step 6d. Each pair to be created is displayed separately in the list of pairs in the Paircreate window. 7. Repeat step 6 until all pairs are displayed. Click Change to replace an S-VOL, click Set to add an S-VOL, and use the Delete command to remove pairs. 8.
pairs (see ”Creating and splitting pairs” on page 66). To open the Pairsplit window, select volumes or pairs in the Volume list on the BC main screen, right-click the selected volumes or pairs, and click Pairsplit.
• 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. • Type: Emulation type of the P-VOL and S-VOL • Capacity (MB): Volume capacity displayed in megabytes (MB) • CLPR(P): Cache logical partition of the P-VOL • CLPR(S): Cache logical partition of the S-VOL Window options Copy Pace list Use this list to select the copy pace (Slower, Medium, or Faster) for all pairs you are splitting.
• The S-VOL List displays the following information related to S-VOLs: • Port: Port ID (cluster and channel number) of the S-VOL • Group (G-ID): Host group ID of the S-VOL • S-Vol Path (LUN): CU:LDEV of the S-VOL • Pair Num: Number of pairs • Type: Emulation type of the S-VOL • Capacity (MB): Capacity of the S-VOL in megabytes (MB) • CLPR: The cache logical partition (CLPR) of the S-VOL Buttons • Set: Adds the selected S-VOL and P-VOL to the Pairsplit Volume List as an L1 pair.
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 P-VOL to the S-VOL, and changes the pair status to PSUS. 1. If you want the split S-VOLs to be identical to the P-VOLs, stop all write operations to the P-VOLs before creating and splitting the pairs.
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, right-click the selected pair, and select Pairresync. Figure 36 Pairresync window The Pairresync window consists of the following components.
• 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. NOTE: You must click Apply on the BC main pane to start the pairresync operation for the specified pairs. • The Cancel button cancels operations set in the Pairresync window and closes the Pairsplit window.
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 S-VOLs are varied offline before starting pairresync operations. 6. In the BC main screen, click Apply to resync the specified pairs. The BC main screen displays the results of the pairresync operations (that is, the pair status changed to COPY(RS), COPY(RS-R), or PAIR). 7. Click Refresh ( ) to monitor the progress of the pairresync operations.
and PSUS(SP) pairs) in the Volume list on the BC main screen, right-click the selected pairs, and select Pairsplit-S. Figure 38 Pairsplit-S window The Pairsplit-S window lists pairs selected on the BC main screen and shows pair status and copy pace for each pair. The OK button deletes selected pairs. The Cancel button closes the Pairsplit-S window and returns to the BC main screen. Deleting one or more BC pairs 1. To synchronize the P-VOL and S-VOL before deleting the pair: a.
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. 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.
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 24 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).
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. NOTE: More options will be supported in the future. See ”BC options” on page 30 for further information. The Apply button applies the option settings in the Select Option box. Setting a BC option (Swap&Freeze option) 1.
Table 25 BC error codes (continued) Error Code Description Corrective Action 0801 The BC feature could not be used. Ensure that the disk array has the correct microcode level for BC, the disk array has BC installed and enabled, and the Command View XP management station or XP Remote Web Console has BC installed and enabled. 080B The request could not be accepted. Retry about one minute later. 0810 The specified command cannot be accepted in this status. (The command was rejected.
Table 25 BC error codes (continued) Error Code Description Corrective Action 0852 Command Reject. P-VOL and S-VOL are used from HOST or by CA. Disconnect from the host, or cancel Continuous Access XP path. 088008FF Logical contradiction. Call HP technical support for assistance. 0C70 A P-VOL is not installed. Volumes that are not installed cannot be processed. 0C71 The P-VOL cannot be used. Call HP technical support to make the P-VOL status normal. 0C72 The P-VOL is being formatted.
Table 25 76 BC error codes (continued) Error Code Description Corrective Action 1017 A Reserve volume cannot be set because the max. number of Reserve volumes was exceeded. Delete any Reserve volumes. 101E The Reserve volume itself does not exist in the system. Set one or more Reserve volumes. 1026 It is impossible to make a pair any more because the volume that was specified as P-VOL is root volume already. Delete some of the pairs of root volume.
Table 25 BC error codes (continued) Error Code Description Corrective Action 1047 The specified secondary volume is being used as a CA S-VOL. Delete the Continuous Access XP pair. 104A The specified secondary volume is being used as a BC P-VOL. Check the pair status. 104B S-VOL is used as source volume for HIHSM. Confirm a matching condition. 104E The volume specified as a Reserve volume is being used as a CA P-VOL. Delete the Continuous Access XP pair.
Table 25 78 BC error codes (continued) Error Code Description Corrective Action 109B Reverse-copy could not be accepted because P-VOL was shared with CA S-VOL whose status was not Suspend. Confirm a matching condition. 109C Reverse-copy could not be accepted because S-VOL was shared with CA P-VOL. Confirm a matching condition.
A Maximum pair calculations Calculating the maximum number of Flex Copy XP copy pairs The maximum number of copy pairs that can be created using Flex Copy XP is 8,192. CAUTION: You cannot create more copy pairs than the number of external volumes that are mapped as internal volumes. When a copy pair is created, differential tables are used.
Calculating the number of pairs you can create If LUSE is not used The maximum number of pairs that can be created is the largest number that meets the equation Σ ( α ) ≤ β , where: • Σ (α) is the total number of differential tables (α) required for creating a copy pair. • β is the number of available differential tables (13,652 with no additional shared memory, 30,718 with additional shared memory).
You can estimate the maximum number of migration plans that can be executed concurrently by applying the previously described conditions to the following equation: Σ ( α ) = ( β ) , where: • Σ(α) is the total number of differential tables needed to migrate all volumes. • (β) is the number of available differential tables.
Table 26 82 Control cylinders by emulation type (continued) 3390-9B 25 3390-9C 25 3390-L 23 3390-LA 23 3390-LB 23 3390-M 53 3390-MA 53 3390-MB 53 3390-MC 53 3390-LC 23 NF80-F 22 NF80-K 7 NF80-KA 7 NF80-KB 7 NF80-KC 7 Maximum pair calculations
Calculating differential tables for open-system volume migration When you migrate open-system volumes, use the information in Table 27 to calculate the total number of required differential tables per migration plan.
Maximum pair calculations
Index A access attributes copying 46 license capacity 47 setting with LUN Security XP Extension 45 activity codes 72 At-Time Split function 34 attributes copying 46 license capacity 47 resetting reserve 58 setting with LUN Security XP Extension 45 audience, documentation 7 authorized resellers, HP 9 Auto LUN, combining with BC 40 B backward pairresync operation 25 BC main screen 49 C Cache LUN, combining with BC 40 cache maintenance 15 cascade function 23, 31 cascade pairs access attributes, copying 47 cr
HP authorized resellers 9 storage web site 9 Subscriber’s choice web site 9 technical support 8 I I/O performance 31, 38, 39 initial copy operation 21 inqraid command 16 L L1 pairs 32, 33, 61 L2 pairs 32, 33, 62 LDEV maintenance 15 leaf volume 32 license capacity, LUN Security XP Extension 47 LUN Security XP Extension combining with BC 45 license capacity 47 LUN Security, combining with BC 40 LUs, maximum number of pairs 20, 80 LUSE operations BC, combining with 40 pairs, maximum number of 20, 80 M main
Pairsplit-E window 69 pairsplit-S operation about 29 pair status 33 shortcuts 53 using 69 Pairsplit-S window 70 PDEV maintenance 15 point-in-time backups 15 power supply, switching off 38 preparing for operations 39 prerequisites 7 Preset Volume list 50, 55 PSUE status about 38 LUN Security XP Extension operations 47 operations available 33 pairresync operation 29 read/write operations 34 resynchronizing pairs 68 shortcuts 53 PSUS status about 37 creating and splitting pairs 66 LUN Security XP Extension ope
SMPL status about 37 creating and splitting pairs 66 LUN Security XP Extension operations 47 shortcuts 53 speed copy pace 60, 64 copy processing time 38 host I/O performance 31, 38, 39 initial copy operation 22 pair resynchronization 29 split pairs, pairresync for 29 splitting cascade pairs 32 pairsplit operation 66 using Pairsplit window 62 starting operations 48 status error codes 73 history 71 icons 50 L1 and L2 pairs 33 LUN Security XP Extension availability 47 pairs 36, 37 power supply, switching off 3
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tables 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 Recommended and minimum firmware versions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Document conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 BC operational requirements for XP12000 and XP10000. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
