HP StorageWorks XP Snapshot Software user guide: HP XP12000, HP XP10000, HP 200 Storage Virtualization System (T1713-96026, March 2009)

CAUTION:
If the host computer uses application software to monitor the XP Snapshot pairs' volumes, problems,
such as abnormal end, might occur. For example, since the S-VOL whose status is not PSUS (or PFUS)
rejects access from the host, a problem might occur on the monitoring application software whose
access is rejected. In addition, if the host computer connects to more than one port, a problem might
also occur on ports that are not connected to the S-VOL that rejected the host access. You must
terminate the application software monitoring the volumes to solve these problems.
Use XP RAID Manager commands to operate XP Snapshot pairs. However, whether the operations
complete normally or not depends on the pair status. Table 8 on page 31 shows the pair status and
results of the RAID Manager commands.
Table 8 Pair status and results of XP RAID Manager commands
XP RAID Manager command
1
Pair status
pairsplit
-E
pairsplit
-S
pairresync
-restore
pairresyncpairsplitpaircreate
-split
paircreate
NoNOPNoNoNoNoOKSMPL
NoNoNOPNOPNoNoNOPCOPY
NoOKNOPNOPOKOKNOPPAIR/PFUL
NoOKOKOKNOPNOPNoPSUS/PFUS
NoNOPNoNoNoNoNoSMPL(PD)
NoNoNOPNOPNoNoNOPCOPY(RS)
NoNoNOPNOPNoNoNOPCOPY(RS-R)
NOPOKNo
OK
2
NoNoNOPSUE
1
OK: Command executes the process and ends normally.
NOP: Command does not execute the process, but ends normally.
No: Command ends abnormally (that is, command is rejected).
2
If you issue the pairresync command for a pair whose status has changed to PSUE because of a shortage of shared memory
for the V-VOL management area, the command is rejected and ends abnormally.
When the command executes the process and ends normally, the pair status changes according to
the process. For more information about how the pair status changes when the command ends normally,
see Figure 4 on page 29 and the corresponding text.
Notes on creating pools
When creating pools, you must be careful about the pool capacity and types of volumes specified as
pool-VOLs. This section describes notes on pool capacity definitions and using external LUs as
pool-VOLs.
XP Snapshot User Guide 31