HP XP Racks - Manual (Page 61)

Related topics
•
“Resync Pairs wizard” (page 138) .
•
“Types of pair resynchronization” (page 55) .
•
“System options that affect performance” (page 34) .
Suppressing update copy operations during pair restoration
You can suppress update copy operations when you restore pairs using Quick Restore. Suppressing
update copy operations keeps the P-VOL and S-VOL unsynchronized and reduces the effect on
host I/O performance.
Prerequisite: The pair status is “DUPLEX”.
•
Enable the Swap & Freeze system option.
For more information about how to enable this system option, see “Enabling system options”
(page 35) .
Related topics
“System options that affect performance” (page 34) .
Workflow for setting the RAID level
Use the following process to resume to the original RAID levels:
1. Split the pair.
For more information about how to split pairs, see “Splitting BC Z pairs” (page 50) .
2. Restore the pair using Quick Restore.
For more information about how to restore pairs using Quick Restore, see “Resynchronizing
or restoring BC Z pairs” (page 58) .
BC Z pair deletion
Delete the BC Z pairs that you no longer need. Deleting a pair unpairs the P-VOL and S-VOL but
does not delete their data. You can use the volumes of deleted pairs in another pair.
If you are sharing BC Z S-VOLs with Cnt Ac-J Z P-VOLs and you plan to perform a CG pair-split,
register the split time for an BC Z CG before you delete the pair. The registered split time is deleted
when you delete the following pairs:
•
The BC Z pairs that are assigned to the BC Z CG.
•
The Cnt Ac-J Z pairs that are assigned to the Cnt Ac-J Z R-JNL, which is the journal volume on
the remote system associated to the S-VOL.
Related topics
•
“Prerequisites for deleting BC Z pairs” (page 61)
•
“Deleting BC Z pairs” (page 62)
•
“Monitoring BC Z pair activity and status” (page 65) .
•
“MP blades and deleting pairs” (page 63) .
Prerequisites for deleting BC Z pairs
The pair must be unpaired and not in the process of being deleted and the volumes are not in the
process of being unpaired (“Deleting/TRANS” status).
Suppressing update copy operations during pair restoration 61