HP XP Racks - Manual (Page 51)

Restrictions for consistency group pair-split
Consistency group (CG) pair-split has the following restrictions:
•
To perform a CG pair-split on BC pairs, the pairs must have been created using RWC. You
cannot use CG pair-split if the pairs were created using RAID Manager.
Related topics
•
“Requirements, restrictions, and guidelines for using consistency group pair-split with shared
BC and Cnt Ac-S or Cnt Ac-J volumes” (page 20)
.
Workflow for maintaining consistent Business Copy secondary volume backups
If you are sharing BC P-VOLs with Cnt Ac-S or Cnt Ac-J S-VOLs, use the following workflow to
maintain a consistent backup of BC S-VOLs:
1. Assign Cnt Ac-J pairs to the same journal group.
For more information about assigning BC pairs to journals, see the HP XP7 Continuous Access
Journal User Guide.
Related topics
•
“Requirements, restrictions, and guidelines for using consistency group pair-split with shared
BC and Cnt Ac-S or Cnt Ac-J volumes” (page 20)
.
Workflow for ensuring snapshot data is consistent with P-VOL data
Use the following workflow to ensure the snapshot data is consistent with the P-VOL data and is
ready to use in an BC pair user task:
1. Split the pair. To do this, complete one of the following:
•
If you are using RWC, split the BC pairs in the CG.
The volume is split (“PSUS” status).
For more information about how to perform a CG pair-split , see “Workflow for consistency
group pair-split” (page 49) .
•
If you are using RAID Manager to run commands, run the following command on the BC
pair:
pairsplit
BC pair resynchronization
You can resynchronize split (“PSUS” status) or suspended (“PSUE” status) pairs, which pairs the
split volumes. Resynchronizing a split pair copies the P-VOL’s differential data to the S-VOL and
again pairs the S-VOL with the P-VOL. Resynchronizing a suspended pair copies the entire P-VOL
to the S-VOL.
BC pair resynchronization 51