HP XP P9500 Storage - Manual (Page 51)

NOTE: The following concerns possible post-resync conditions:
•
Make sure that pair status changes to PAIR before attempting any other operation.
•
If the reverse or quick restore operation ends abnormally, the pair status changes to PSUE. In
this case, the P-VOL is read/write-enabled for all hosts, but the data is not guaranteed. The
S-VOL remains write-disabled and data is not guaranteed. The status of other pairs sharing
the same P-VOL does not change.
Pair deletion
You can delete a pair when you do not need it. When you delete a pair, the P-VOL and S-VOL
return to their SMPL state, though their data remains intact. After deletion, both volumes are available
for use in another pair.
NOTE: If the pair status changes to SMPL, the status is not shown in RWC.
Related information
•
“Prerequisite information for deleting pairs” (page 51)
•
“Deleting pairs” (page 51)
Prerequisite information for deleting pairs
•
The P-VOL and S-VOL must be synchronized. Before deleting, wait until all write I/O operations
to the P-VOL are completed, set the P-VOL offline, then split the pair.
•
Pair deletion cannot be performed when the pair status is PSUS(SP)/PSUS.
•
When a pair is created, the processor blade allocated to the P-VOL's LDEV is also allocated
to the S-VOL's LDEV. When a pair is deleted, the processor blade that was originally allocated
to the S-VOL's LDEV is allocated to it again. If the original processor blade was removed,
another processor blade is allocated.
•
Deleting a pair first changes the status of the volumes to SMPL(PD) then to SMPL. SMPL status
is not shown in RWC.
To distinguish between SMPL and SMPL(PD) volumes, run the RAID Manager pairdisplay
and Inqraid commands. The pairdisplay command shows status but cannot distinguish
between SMPL and SMPL(PD); and the Inqraid shows whether a volume is being used by
BC.
◦ If the result of the pairdisplay command is SMPL, and the result of the Inqraid
command is the P-VOL or S-VOL, then BC is still using the pair and status is SMPL(PD).
◦ If the result of the pairdisplay command is SMPL, and the result of the Inqraid
command is not the P-VOL or S-VOL, then BC is not using the volumes. Therefore, status
is confirmed as SMPL.
•
After deleting a pair, wait 10 seconds—until volume status changes from SMPL(PD) to
SMPL—before performing tasks such as a pair operation or event waiting. If you do not wait
10 seconds, the operation might end abnormally.
Deleting pairs
1. In the tree, click Replications > Local Replications.
2. In the Pairs tab, select the pair you want to delete, and click More Actions > Delete Pairs.
Pair deletion 51