HP StorageWorks XP Remote Web Console Software - Manual (Page 77)

Note: Use the Change button to replace S-VOLs, the Cascade button to add L2 S-VOLs, and
the Delete command selected from the pop-up menu (that will be displayed by right-clicking)
to remove pairs.
9. When the Pairsplit dialog box displays the desired L1 and L2 pairs, click OK to reflect the
settings in the Pairsplit dialog box to the Preview List on the Pair Operation window.
10. On the Pair Operation window, click Apply to apply the operation settings in the Preview
List to the storage system.
The pairs will then be created and split according to the operations set in the Pairsplit dialog
box. When the paircreate and pairsplit operations start, the Pair Operation window will show
that the status of the new pairs has changed to COPY(SP) or PSUS(SP) and the progress (%) of
the ongoing update copy operations. The pair status will change to PSUS when the pairsplit
operation completes. If there were no pending update copy operations, the pair status will
change to PSUS right away.
Performing At-Time Split Operation (Multiple Pair Splitting)
By using RAID Manager, you can split the multiple Business Copy pairs in the same consistency group
at once. You need to define the consistency group in the RAID Manager configuration definition file.
Business Copy consistency groups have the following restrictions:
Table 23 Specifications of Consistency Groups
Items Descriptions
Consistency group
number
A number (0−127) is assigned to each consistency group. You can specify a
consistency group number when you create Business Copy pairs. If you do not
specify a number, then the storage system assigns a number automatically. To
confirm the Business Copy consistency group numbers, you may use the Volume
List of the Pair Operation window.
You can configure up to 128 consistency groups in a storage system, including
the ShadowImage for Mainframe consistency groups.
Number of pairs
You can define up to 8,192 Business Copy pairs in a consistency group.
However, for LUSE volumes that contain n LDEVs, you should count as n
volumes. For further information on LUSE volumes, see the HP StorageWorks
XP24000 LUN Expansion User’s Guide.
Note that the Business Copy pairs and the ShadowImage for Mainframe pairs
cannot co-exist in the same consistency group.
To enable the At-Time Split function using RAID Manager:
Note: The following steps provide only the overview information. For detailed information, see the HP
StorageWorks XP RAID Manager User’s Guide.
1. Define a consistency group for the desired Business Copy pairs.
2. Specify the At-Time Split option.
3. Specify the split type, Quick Split or Steady Split.
4. Execute the paircreate command.
Business Copy pairs that can be the targets of the At-Time Split operation are created.
5. Execute the pairsplit command on the created Business Copy At-Time Split pairs.
The At-Time Split option is enabled, and data in all P-VOLs in the same consistency group is
created in the corresponding S-VOLs at the time when the pairsplit request is received by the
storage system.
Caution: You can perform Business Copy pair operations from the Remote Web Console computer on the
Business Copy At-Time Split pairs created by RAID Manager; however, the At-Time Split option is disabled
(the pairsplit operation does not ensures creating S-VOLs of the P-VOLs in the same consistency groups).
• Notes on consistency group:
XP24000 Business Copy Software User's Guide 77