HP StorageWorks P9000 User Manual
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HP StorageWorks P9000 User Manual

HP StorageWorks P9000 User Manual

Business copy user guide
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HP StorageWorks
P9000 Business Copy User Guide
Abstract
This guide explains how to use HP StorageWorks P9000 Business Copy Software to create nondisruptive, high-speed internal
copies of information stored by open-systems hosts on HP Storage Works P9000 disk arrays and attached heterogeneous
external storage systems. Topics include how to create, split, suspend, resynchronize, and troubleshoot Business Copy pairs
using the Remote Web Console web client. The intended audience is a storage system administrator or authorized service
provider with independent knowledge of HP StorageWorks P9000 disk arrays and the HP StorageWorks Remote Web Console.
HP Part Number: AV400-96342
Published: January 201 1
Edition: Third

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  • Page 1 P9000 Business Copy User Guide Abstract This guide explains how to use HP StorageWorks P9000 Business Copy Software to create nondisruptive, high-speed internal copies of information stored by open-systems hosts on HP Storage Works P9000 disk arrays and attached heterogeneous external storage systems.
  • Page 2 © Copyright 2010, 201 1 Hewlett-Packard Development Company, L.P. Confidential computer software. Valid license from HP required for possession, use or copying. Consistent with FAR 12.21 1 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.

  • Page 3: Table Of Contents

    Contents 1 Business Copy overview................5 Business Copy software......................5 How Business Copy works......................5 Hardware and software components ..................5 Volume pairs (P-VOLs and S-VOLs)..................6 Cascaded pairs ......................6 Remote Web Console GUI....................7 RAID Manager and consistency groups..................7 Initial and update copy operations....................7 Initial copy..........................8 Update copy........................8 2 Requirements and planning...............10 System requirements........................10...
  • Page 4 Resynchronize pairs........................32 Delete pairs...........................34 6 Monitoring and maintaining the system............36 Monitoring the system ......................36 Monitoring pair activity, status ....................36 Pair status definitions.....................36 Operations permitted for L1, L2 pairs ................37 Reviewing pair, volume details.....................38 Reviewing S-VOL path information..................40 Reviewing pair, license information ..................41 Reviewing a pair’s operation history..................43 Maintaining the system......................44 Remove reserve attribute from a volume................44...

  • Page 5: Business Copy Overview

    1 Business Copy overview Unless otherwise specified, the term P9000 in this guide refers to the following disk array: P9500 Disk Array The GUI illustrations in this guide were created using a Windows computer with the Internet Explorer browser. Actual windows may differ depending on the operating system and browser used. GUI contents also vary with licensed program products, storage system models, and firmware versions.

  • Page 6: Volume Pairs (P-Vols And S-Vols)

    Figure 1 Business Copy configuration Volume pairs (P-VOLs and S-VOLs) A pair consists of the primary and secondary data volumes. Each P-VOL can be paired with up to three S-VOLs. Thus, you can create three pairs using one P-VOL. During most operations, the P-VOL remains available to the host for I/O operations. When the P-VOL is updated, the new data, called differential data, is copied to the S-VOL regularly.

  • Page 7: Remote Web Console Gui

    Figure 2 Structure of cascaded pairs The P-VOL of the L1 pair is the "root volume." An S-VOL of the L1 pair is a "node volume." A P-VOL of an L2 pair is an L1 S-VOL — a node volume. An S-VOL of an L2 pair is a "leaf volume."...

  • Page 8: Initial Copy

    Initial copy When you create a pair, the initial copy is started by the system, and all the data in the P-VOL is copied to the S-VOL. Before the pair creation the pair’s status is SMPL. While the initial copy is in progress, the status is COPY. The status changes to PAIR when the initial copy is complete.
  • Page 9 Figure 4 Update copy operations Although an initial copy completes and pair status changes to PAIR, the data in the P-VOL and S-VOL may not be the same because the copy of the update data is performed asynchronously. To insure that P-VOL and S-VOL data are the same at a certain point in time, the pair must be split. CAUTION: If the copy operation is completed without any host I/O, the data in the P-VOL and the data in the S-VOL may not be the same.

  • Page 10: Requirements And Planning

    Based on purchased capacity. See “License capacity requirements” (page 11). capacity License key Must be installed. See HP StorageWorks P9000 Remote Web Console User Guide for instructions. RAID level RAID 1, RAID 5, RAID 6 Remote Web Console If you use Remote Web Console, it is necessary to be in Modify mode to perform pair operations.

  • Page 11: License Capacity Requirements

    At-Time Split operation with which you can specify the split time. See the HP StorageWorks P9000 RAID Manager User Guide for information on setting up consistency groups and performing pair operations.

  • Page 12: Planning Number Of Pairs

    Business Copy pairs. You can also query the number of the differential tables not used in the storage system by using this command. For details about the inqraid command, see the HP StorageWorks P9000 RAID Manager User Guide. Calculating number of differential, pair tables The emulation type of your volumes affects the number of differential and pair tables.

  • Page 13: Calculating Maximum Number Of Pairs

    To calculate the number differential and pair tables except for OPEN-V Total number of differential tables per pair = ((volume capacity KB ÷ 48) + (number of the control cylinders* × 15) ÷ (20,448**) * See the following table. ** Number of the slots that can be managed by a differential table Round up the total number to the nearest whole number.
  • Page 14 Σ {(α) x (the number of Business Copy pairs)} ≤ (β) and Σ {(γ) x (the number of Business Copy pairs)} ≤ (δ) where: (α): Required number of differential tables per pair (per previous calculation). (β): Number of differential tables available in the system (Table 2 (page 12)).

  • Page 15: Organizing Volumes Into P-Vols And S-Vols

    Organizing volumes into P-VOLs and S-VOLs Before creating pairs, it is necessary to prepare volumes for Business Copy. The following table provides an example of volume information to prepare volumes. Table 4 Volume information for Business Copy Port GID: Pair Volume Associated L1 Associated L1 Associated...

  • Page 16: System Options

    Alternatively, you can release Cache Residency settings before the quick restore operation, then reset them when the operation is completed. See the HP StorageWorks P9000 Performance for Open and Mainframe Systems User Guide for more information on settings. CAUTION: It is recommended that Quick Restore should not be performed when the P-VOL and S-VOL are in different CLPRs.
  • Page 17 NOTE: The Copy Threshold option performs only when workload is heavy; The Host I/O Performance option suppresses copy operations at all times regardless of workload level. When the Copy Threshold Option is set, the option is effective for all of the following program product: ◦...

  • Page 18: Sharing Business Copy Volumes

    3 Sharing Business Copy volumes Business Copy volumes can be shared with other HP program products. This chapter discusses requirements, recommendations, and restrictions for using Business Copy with other products. Open Volume Management Both LUSE and Virtual LUN volumes can be used as Business Copy volumes. With LUSE volumes, the P-VOL and S-VOL must have the same configuration (the same LU capacity and the same number of LUs).

  • Page 19: External Storage

    The Quick Restore operation can be performed on a Business Copy pair when the Continuous Access Synchronous pair is suspended. For details, see the section on sharing volumes with Business Copy in the HP StorageWorks P9000 Continuous Access Synchronous User Guide.

  • Page 20: Thin Provisioning

    Figure 5 Cnt Ac-J, Cnt Ac-S, and BC shared volume configuration 1 Figure 6 Cnt Ac-J, Cnt Ac-S, and BC shared volume configuration 2 All Business Copy operations, with the following exceptions, can be performed in the Continuous Access Synchronous and Continuous Access Journal secondary sites, irrespective of Continuous Access Synchronous pair status.
  • Page 21 When a Thin Provisioning volume is used for only the S-VOL, you cannot perform Quick Restore. And, it is not recommended since the S-VOL consumes the same amount of the pool capacity as the P-VOL. You cannot perform Business Copy pair operations while you increase the capacity of Thin Provisioning volumes.

  • Page 22: Performing Configuration Operations

    4 Performing configuration operations This chapter provides configuration information and instructions. Configuration workflow Setup for Business Copy consists of the following: Making certain that primary and secondary volumes are set up correctly. Reserving volumes for use as S-VOLs. (Optional.) Setting the HOST I/O Performance option, which boosts I/O performance though copy time slows as a result.

  • Page 23: Set Host I/O Performance Option

    Assure that the right volume(s) that you reserved, then click OK. The selected volumes display in the Preview List. When ready, on the Pair Operations window click Apply. To confirm the settings are applied, use the Display Filter dialog box. NOTE: LDEVs for P-VOLs and S-VOL s listed in Remote Web Console may end in the following special symbols:...
  • Page 24 In the Business Copy Option window, select the Host I/O Performance box. Click Apply. Performing configuration operations...

  • Page 25: Performing Pair Operations

    5 Performing pair operations This chapter provides instructions for performing pair operations using Remote Web Console. Pair operations workflow A typical operations workflow consists of the following: Check pair status. Each operation requires a pair to have a specific status. You also check pair status to insure than an operation completed successfully.
  • Page 26 Because pair creation affects performance on the host, observe the following: Create a pair when I/O load is light. ◦ Limit the number of pairs that you create simultaneously. ◦ When a pair is created, the processor blade allocated to LDEV that is used the S-VOL is allocated to the processor blade allocated to the P-VOL.

  • Page 27: Split, Create And Pairs

    NOTE: - When the Preview List already holds some Add Pair operation settings, and you specify a different copy pace for new pairs in the Add Pair dialog box, the copy pace for the existing Add Pair settings displayed in the Preview List will be also changed. The latest copy pace specified in the Add Pair dialog box is always reflected to the storage system.
  • Page 28 NOTE: The P-VOL and S-VOL are synchronized only when the pair status changes from COPY(SP) or PSUS(SP) to PSUS. Due to the Business Copy asynchronous update copy operations, this status transition can take several minutes. If you want the S-VOLs you are intending to split to be identical to the P-VOLs, stop all write operations to the P-VOLs before splitting the pairs.
  • Page 29 In the Pairsplit dialog box, proceed as follows: Assure that the right pair that you want to split. Select the SMPL volume to be the P-VOL in an L1 pair create and split operation. Select the L1 pair whose S-VOL will be the P-VOL in an L2 pair create and split operation. From Copy Pace, select the pace at which the pair(s) are to be split, Slower, Medium, or Faster.

  • Page 30: Splitting Consistency Group Pairs With At-Time Split

    Select an Attribute to display volumes previously reserved as S-VOLs, or volumes that are not reserved. You can select both if desired. You can also filter by existing pairs that may be used for creating L2 pairs (Pair check box). 12.
  • Page 31 becomes COPY(RS), and the entire P-VOL is copied to the S-VOL. While the pairresync operation for a split pair can be very fast, the pairresync operation for a suspended pair takes as long as the initial copy operation. The storage system will automatically suspend a pair when it cannot keep the pair mirrored for any reason.

  • Page 32: Resynchronize Pairs

    Resynchronize pairs You resynchronize a pair that was split by a user or suspended by the system. Resynchronizing updates the S-VOL so that it is again paired with the P-VOL. CAUTION: Resynchronizing the pair does not guarantee that P-VOL data is the same as S-VOL data.
  • Page 33 If the reverse or quick restore pairresync operation is performed on one Business Copy pair in a 1 to n Business Copy configuration (n>1), the P-VOL and the other S-VOL are no longer synchronized. With the Reverse Copy or Quick Restore operation, the following restrictions apply: ◦...

  • Page 34: Delete Pairs

    In the Pairresync dialog box, select the Resync Type as follows: CAUTION: Make sure to select the correct resync direction. Normal Copy(P->S) to resynchronize the pair(s) normally. All differential data is updated to the S-VOL. Quick Resync(P->S) to immediately change pair status to PAIR. Resynchronization of data does not occur immediately.
  • Page 35 The S-VOL’s processor blade, whose allocation was changed for creating pair, is allocated again to the former processor blade when the pair is deleted. If the previous processor blade was removed, an appropriate processor blade is allocated. CAUTION: If you delete a pair, the volume status changes from SMPL(PD) to SMPL. You can check the volume status in the Pair Operation window.

  • Page 36: Monitoring And Maintaining The System

    6 Monitoring and maintaining the system This chapter provides information and instructions for monitoring and maintaining the Business Copy system. Monitoring the system Monitoring helps you keep track of pairs and volumes and their current and past conditions. Monitoring should be an ongoing activity. This section provides information for monitoring the following: Pair status.

  • Page 37: Operations Permitted For L1, L2 Pairs

    Table 5 Pair status definitions (continued) Status Description S-VOL Access COPY(SP) The pairsplit operation in the steady split mode has begun. Any remaining Read only differential data is copied to the S-VOL. When these updates are complete, the pair is split. The split S-VOL is identical to the P-VOL at the time of the split. PSUS(SP) The pairsplit operation in the quick split mode has begun.

  • Page 38: Reviewing Pair, Volume Details

    Table 6 Supported L1 pair operations for related L2 status (continued) L2 Pair Status L1 Pair Operations Paircreate Pairsplit Pairresync Pairsplit-E Pairsplit-S PSUE * Not displayed in Remote Web Console. Table 7 Supported L2 pair operations for related L1 status L1 Pair Status L2 Pair Operations Paircreate...
  • Page 39 NOTE: LDEVs for P-VOLs and S-VOL s listed in Remote Web Console may end in the following special symbols: A pound or gate symbol (#), which indicates an external volume (for example, 00:00:01#). The letter “X”, which indicates that a virtual volume used by Thin Provisioning (for example, 00:00:01X).

  • Page 40: Reviewing S-Vol Path Information

    Table 10 Fields in detail dialog box (continued) Field Description Pair Information P-VOL: Displays LUN information using LDKC number:CU number:LDEV number format. S-VOL: Displays LUN information using LDKC number:CU number:LDEV number format. MU: The pair’s MU number (mirror unit number). Status: The status of the pair.

  • Page 41: Reviewing Pair, License Information

    Table 1 1 Fields in S-VOL path dialog box Field Description Pair Information P-VOL and S-VOL columns displays the following path information (examples below from P-VOL column): Port ID (cluster name and channel number. For example: CL3-D) Group number (GID) of the host group. For example: 00 LU number.
  • Page 42 Right-click on the volume list, in any location, then select Information from the menu. The Information dialog box displays. Field descriptions are provided below. Table 12 Fields in the information dialog box Field Description Business Copy pair(s) Shows the number of Business Copy pairs/and the total number of pair tables for Business Copy and Business Copy Z.

  • Page 43: Reviewing A Pair's Operation History

    Table 12 Fields in the information dialog box (continued) Field Description Remaining differential table(s) Displays the number of remaining differential tables in the storage system/and the total number of differential tables in the system. For more information, see “Calculating number of differential, pair tables” (page 12).

  • Page 44: Maintaining The System

    To change the displaying order, click a column title in the list. The list will be sorted based on the items in the clicked column. If there are more than 16,384 records of operations, the list will be divided into multiple pages and only the list which is currently displayed will be sorted.

  • Page 45: Pair Operations During System, Device Maintenance

    In the volume list, right-click the desired SMPL volumes, then click Change Reserve from the menu. The Reset Reserve Attribute dialog box displays. Select the volume(s) from which you want to remove the attribute, then click OK. The selected volumes display in the Preview List. To change a selection, right-click, select Modify, and make your changes.

  • Page 46: When Switching Power Off

    When switching power off During pair operations, when you switch off the power-supply for the system, make sure of the following: Complete processing for an At-Time Split operation before switching off the power-supply. If this is not done and the status of some of the pairs in the consistency group is changed but not others, the At-Time Split processing may not resume when you power-on the power-supply.

  • Page 47: Troubleshooting

    Remote Web Console during right-click to display the menu, and then click Error Detail. See HP an operation. StorageWorks P9000 Remote Web Console Messages for the list of error codes and corrective actions. Business Copy pair status is incorrect (or The pair may have been suspended or deleted from the UNIX/PC server unexpected).
  • Page 48 Do one of the following: If using the RAID Manager-window log, locate the error code you are investigating. An example error code in the RAID Manager-window log is: It was rejected due to SKEY=0x05, ASC=0x20,SSB=0xB9E1,0xB901 on Serial#(64015) If using the operation log file, locate the error code you are investigating. An example error code in the log file is: 11:06:03-37897-10413- SSB = 0xb9a0,2089 Locate the SSB1 and SSB2 codes.
  • Page 49 Table 14 RAID Manager error codes (SSB1 code: b9a0/b9a1/b9a2/b9a5/b9a6/b9ae/b9af) (continued) SSB2 code Description 2068 Because the specified P-VOL or S-VOL was being shredded, the pair operation was rejected. 2072 The pair operation was rejected for one of the following reasons: The P-VOL was also a Snapshot pool volume.
  • Page 50 Table 14 RAID Manager error codes (SSB1 code: b9a0/b9a1/b9a2/b9a5/b9a6/b9ae/b9af) (continued) SSB2 code Description 20a0 The specified pairs contain the Continuous Access Synchronous asynchronous volumes. Because the CLPRs of the P-VOL and S-VOL of the specified pair were different, the quick restore operation was rejected.
  • Page 51 Table 14 RAID Manager error codes (SSB1 code: b9a0/b9a1/b9a2/b9a5/b9a6/b9ae/b9af) (continued) SSB2 code Description 2310 The pair operation was rejected due to one of the following causes. Because the specified consistency group number had already been used for L1 pair, the pair creation was rejected Because the specified consistency group number had already been used for L2 pair, the pair creation was rejected.
  • Page 52 Table 14 RAID Manager error codes (SSB1 code: b9a0/b9a1/b9a2/b9a5/b9a6/b9ae/b9af) (continued) SSB2 code Description 2332 Because the volume specified as the P-VOL had already had three S-VOLs, the pair creation was rejected. 2333 Because the volume specified as the P-VOL was not the P-VOL of the existing pair, the pair operation was rejected.
  • Page 53 Table 14 RAID Manager error codes (SSB1 code: b9a0/b9a1/b9a2/b9a5/b9a6/b9ae/b9af) (continued) SSB2 code Description 2351 Because the volume specified as the P-VOL and the volume specified as the S-VOL was the same one, the pair operation was rejected. 2352 Because the specified P-VOL and S-VOL was online to the host, the quick restore operation or the reverse copy operation was rejected.

  • Page 54: Troubleshooting The At-Time Split Operation

    Table 14 RAID Manager error codes (SSB1 code: b9a0/b9a1/b9a2/b9a5/b9a6/b9ae/b9af) (continued) SSB2 code Description 2394 Because the number of the pairs in a consistency group exceeded the definable maximum number of pairs, the registering of the pair in the consistency group was rejected. 2395 Because the pair sharing the specified P-VOL as the P-VOL was undergoing the reverse copy operation or the quick restore operation, the pair operation was rejected.
  • Page 55 abnormally with the error code EX_EWSTOT. This error indicates that a timeout has occurred. Probable reasons why the pair status cannot be changed are the following: The Continuous Access Journal pair belongs to a consistency group. The P-VOL and the S-VOL of this pair have the same contents.

  • Page 56: Support And Other Resources

    HP StorageWorks P9000 Continuous Access Synchronous for Mainframe Systems User Guide HP StorageWorks P9000 Continuous Access Synchronous User Guide HP StorageWorks P9000 External Storage for Open and Mainframe Systems User Guide HP StorageWorks P9000 for Compatible FlashCopy Mirroring User Guide...

  • Page 57: Conventions For Storage Capacity Values

    Conventions for storage capacity values P9000 disk arrays use the following values to calculate physical storage capacity values (hard disk drives): 1 KB (kilobyte) = 1,000 bytes 1 MB (megabyte) = 1,000 bytes 1 GB (gigabyte) = 1,000...

  • Page 58: Hp Product Documentation Survey

    WARNING! Indicates that failure to follow directions could result in bodily harm or death. CAUTION: Indicates that failure to follow directions could result in damage to equipment or data. IMPORTANT: Provides clarifying information or specific instructions. NOTE: Provides additional information. TIP: Provides helpful hints and shortcuts.

  • Page 59: A Business Copy Gui Reference

    The Pair Operation window displays information about both Business Copy and Snapshot pairs. However, this section only explains the items related to the Business Copy pairs. For details about the items related to the Snapshot pairs, see the HP StorageWorks P9000 Snapshot User Guide.

  • Page 60: Volume List

    Table 16 Menu commands (continued) Field Description Icons Displays all available volumes and is on the upper right of the Pair Operation window. For details, See Volume List. L1 pair L2 pair S-VOL Reserved volume. In Preview list, this is a preview item. Error.
  • Page 61 Table 17 Volume list Field Description Message A message displays when there is no volume or pair to display. If you see the message in the Volume List, click a different icon in the Tree on the left area of the Pair Operation window.

  • Page 62: Preview List

    Table 17 Volume list (continued) Field Description CLPR (P) The P-VOL’s cache logical partition displays. CLPR (S) The S-VOL’s cache logical partition displays. Preview List The Preview List shows the operations and changes you have made from the Pair Operation window. You can review your changes, modify the operation or your changes, and apply them to the storage system.

  • Page 63: Display Filter Dialog Box

    Table 19 Menu Commands (continued) Command Description Pairresync Opens the Pairresync dialog box, in which you resynchronize pairs. Pairsplit-E Opens the Pairsplit-E dialog box, in which you suspend pairs. Pairsplit-S Opens the Pairsplit-S dialog box, in which you delete pairs. Change Reserve Opens the Set/Reset Reserve Attribute dialog box, in which you set/reset the S-VOL reserve attribute.

  • Page 64: History Window

    Table 20 Display Filter dialog box (continued) Field Description Attribute Volume Attribute. If you select the Reserved check box, only reserved volumes display. Reserved volumes include volumes specified as S-VOLs. Pair Attribute. You can choose to display pair volumes, non-pair volumes, or cascade levels (L1 or L2).

  • Page 65: Option Window

    Table 21 History window Field Description Date Displays the date and time (YYYY/MM/DD hour/min/sec) when a Business Copy pair or volume operation has been performed. P-VOL The LDKC:CU:LDEV of the P-VOL used in the operation. S-VOL The LDKC:CU:LDEV of the S-VOL used in the operation. Code Displays Business Copy reference codes.
  • Page 66 Click the check box to enable the option. Clear the check box to disable the option. Click Apply to commit the option to the system, otherwise click Cancel. Business Copy GUI reference...

  • Page 67: Glossary

    LDEVs. Total capacity is the sum of the capacity of all LDEVs on the disk array. HP StorageWorks P9000 or XP Business Copy. An HP StorageWorks application that provides volume-level, point-in-time copies in the disk array.
  • Page 68 P9000 or XP disk array. RAID Manager The CLI configuration and replication tool for the P9000 or XP disk array that can be used by system administrators to enter RAID Manager commands from open-system hosts to perform TrueCopy, ShadowImage, Data Integrity Check operations, and provisioning commands on logical devices.
  • Page 69 T-VOL Target volume. V-VOL Virtual Volume. VOL, vol Volume. volume Volume on disk. An accessible storage area on disk, either physical or virtual. Worldwide name.

  • Page 70: Index

    Index Option window, At-Time Split operation, pair creation, Pair Operation command menu, Business Copy, Pair Operation window, pair operations, and system maintenance;system maintenance and pair Cache Residency, ops, calculating maximum number of pairs, pair operations workflow, calculating number of pairs, pair status, contacting HP, pair tables,...
  • Page 71 update copy, volume pairs, volume types, websites HP , HP Subscriber's Choice for Business, product manuals,...

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