HP SVS200 - Manual

Tables 1 .. Document conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2 .. BC operational requirements for the array . . . . . . . . . . . . . . . . . . . . . 14 3 .. Total number of differential tables per pair . . . . . . . . . . . . . . . . . . . . . 17 4 .. Number of c...

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 i...

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.com website addresses Bold text • Keys that are pressed • Text typed into a GUI element, such as a box • GUI elements th...

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...

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-VO...

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...

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 con fi gured. The P-VOL and S-VOL must be the same type (for example, OPEN-...

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) mai...

• 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 C...

Table 3 Total number of differential tables per pair Emulation type Equation OPEN-3OPEN-8OPEN-9OPEN-EOPEN-L 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 ) •...

Table 5 Relationship between emulation type, capacity, and differential tables Emulation type Capacity 1 Differential tables per pair OPEN-3 Does not depend on capacity 1 Up to 2.7GB 1 Up to 5.5GB 2 OPEN-9 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 OPEN-E Up to 13.5GB 5 O...

Capacity 1 Differen- tial tables Capacity 1 Differen- tial tables Capacity 1 Differen- tial 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 U...

• ( 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 thre...

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 ...

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...

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-...

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 pairr...

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 q...

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 dat...

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...

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 op...

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 fi rst 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 p...

Table 10 Relationship between L2 pair status and L1 pair operations L1 Pair Operations L2 Pair Status Paircreate Pairsplit Pairresync Reverse/ Quick Restore Pairsplit-E Pairsplit-S COPY(PD) OK 1, 2 OK OK OK OK OK PAIR OK 1, 2 OK OK OK OK OK COPY(SP) NO 2 (CMD RJT) NO 2 (CMD RJT) NO(CMD RJT) NO(CMD R...

Table 12 Read/write operation (host to the leaf volume) and L2 pair status L2 Pair Status COPY PAIR COPY(SP) PSUS(SP)/ PSUS COPY(RS) PSUE Read Only 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 di...

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. De fi ne a consistency group for BC pairs. You cannot de fi ne L1 and L2 cascade pairs (see Cascade function ) sharing the same node volume in a consist...

NOTE: After the pairsplit, response time of the fi rst I/O to each logical unit (LU) can be up to approximately fi ve seconds in the worst case. This worst case should be in a one-to-three BC pair situation and 36 LDEV LUSE con fi guration. Pair status The BC remote console software displays the pai...

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...

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...

• 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...

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 L...

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 (...

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. This con...

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 (sy...

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 th...

Table 17 VMA setting and availability of Paircreate operation S-VOL P-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 u...

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 speci fi ed 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 co...

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 functio...

Figure 26 BC main screen You can now perform BC operations. You fi rst 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 scre...

NOTE: You can fi lter 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 ...

NOTE: The value (X) does not include Auto LUN XP, Flex Copy, Snapshot XP, Hitachi FlashCopy Mirroring, or Hitachi FlashCopy Mirroring Version 2 pairs. If these pairs exist, BC paircreate operations may fail, even when (X) is less than 8,191. • Reserve : X(Y)/Z, where: X = total number of BC reserved...

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 pa...

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 pai...

Figure 28 Detail window S-Vol Path window This window displays information on the selected pair (all paths de fi ned 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 comma...

Display Filter window This window fi lters volumes displayed in the Volume list by reserve attribute, pair condition, and pair status. To open the Display Filter window, click Display Filter on the BC main screen, or select any pair or volume in the Volume list, right-click, and select Display Filte...

• 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 bo...

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 ....

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 ...

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 Reserv...

• 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 ...

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 fi lters S-VOLs displayed in the S-VOL list. • Port list: Displays available S-VOLs by port. • Volume Type : • Int...

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, selec...

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...

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 fi rst S-VOL of each volume pair • Group (G-ID) : Host group ID of the S-VOL • SvolMod...

2. In the BC main screen, select the port, host group, or P-VOL in the Tree View box to fi lter 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) p...

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. T...

• 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 ) f...

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 t...

4. Repeat step 2 — step 3 to suspend additional pairs in the list. 5. In the BC main screen, click Apply to suspend the speci fi ed 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 infor...

Figure 39 History pane NOTE: If Snapshot XP is installed, the lower area of the pane lists the operation history of Snapshot XP pairs. For more information, see the HP StorageWorks Snapshot XP user guide . The upper area of the History pane lists the operation history of BC pairs. The upper area of ...

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...

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 c...

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 B backwa...