HP XP Racks - Manual (Page 58)

NOTE: The pair can also be in the process of being Quick Split (“V-Split/SUSPVS” status).
3. (Optional) If you are concerned about host I/O performance, check to make sure the I/O
load is light.
For more information about checking I/O performance-related information, see the HP XP7
Remote Web Console User Guide.
4. Resynchronize the pair.
For more information about resynchronizing BC Z pairs, see “Resynchronizing or restoring
BC Z pairs” (page 58) .
Related topics
•
“System options that affect performance” (page 34) .
•
“Guidelines for maximizing host I/O performance” (page 18) .
•
“Forward resynchronization” (page 56) .
•
“Pair splitting methods” (page 49) .
Workflow for restoring BC Z pairs
Use the following workflow to restore BC Z pairs:
1. Place the P-VOL offline.
2. Split or suspend the pair.
If you plan to restore pairs using Reverse Copy, split or suspend the pairs sharing the same
P-VOL.
If the BC Z pair you plan to restore shares a volume with Cnt Ac-S Z or Cnt Ac-J Z, suspend
the Cnt Ac-S Z or Cnt Ac-J Z pair.
For more information about splitting BC Z pairs, see “Splitting BC Z pairs” (page 50) .
For more information about suspending pairs, see “Suspending BC Z pair creation” (page 45) .
3. Restore the pair.
For more information about restoring pairs, see “Resynchronizing or restoring BC Z pairs”
(page 58) .
Related topics
•
“System options that affect performance” (page 34) .
•
“Reverse resynchronization” (page 56) .
•
“Pair splitting methods” (page 49) .
Resynchronizing or restoring BC Z pairs
Use this task to resynchronize or restore split or suspended pairs.
Running this command typically takes less time than resynchronizing suspended pairs
(“Suspend/SUSPER” status). Split pairs typically contain much less accumulated differential data
than the total amount of data in the P-VOL.
Prerequisites:
•
After performing a Quick Split, wait 20 seconds before a Normal Copy or Quick Resync
resynchronization, otherwise the operation might end abnormally.
If you are using RAID Manager to run commands, run the following command to resynchronize
split pairs (“Split/SUSPOP” status):
58 Managing Business Copy Z pairs