HP XP7 Storage - Manual (Page 76)

A pair is created and defined in a consistency group. This group is the target of the consistency
group pair-split. The consistency group number option you specified automatically enables
the consistency group pair-split.
2. Create the pair to store snapshot data for a group. To do this, using the RAID Manager, run
the following raidcom command:
raidcom modify snapshot -snapshot_data create
3. The XP7 storage system receives the command. The storage system stores the snapshot data
for the consistency group that is the target of the consistency group pair-split.
4. A host issues a write request to the FS pair’s P-VOL that is assigned to the consistency group.
The pairs are split and the snapshot data is stored.
Related topics
•
“Workflow for consistency group pair-split with shared volumes” (page 76)
•
“Workflow for troubleshooting storing snapshot data for groups” (page 155) .
•
“Workflow for defining pairs to consistency groups when the host is down” (page 72)
Workflow for consistency group pair-split with shared volumes
If you are sharing FS P-VOLs with BC, Cnt Ac-J, or Cnt Ac-S S-VOLs within a storage system, you
can consistency group pair-split to split the pairs that are defined in a consistency group to store
the snapshot data. Consistency group pair-split maintains consistency for the FS S-VOLs that are
defined in the consistency group.
If you are sharing FS P-VOLs with Cnt Ac-J or Cnt Ac-S S-VOLs, use the following process to
consistency group pair-split:
1. Define the FS pairs in a consistency group.
For more information about defining pairs in consistency groups, see “Creating Fast Snap
pairs and defining them in snapshot or consistency groups using the RAID Manager” (page 63) .
2. Use the consistency group pair-split to maintain consistency for multiple FS S-VOLs.
The following figures illustrate these configurations.
The following figure shows the consistency group pair-split configuration when you are sharing FS
P-VOLs with Cnt Ac-J S-VOLs.
76 Managing Fast Snap Pairs