Notes on creating pools – HP StorageWorks XP Remote Web Console Software User Manual
Page 31
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.
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
pairresync
pairsplit
paircreate
-split
paircreate
No
NOP
No
No
No
No
OK
SMPL
No
No
NOP
NOP
No
No
NOP
COPY
No
OK
NOP
NOP
OK
OK
NOP
PAIR/PFUL
No
OK
OK
OK
NOP
NOP
No
PSUS/PFUS
No
NOP
No
No
No
No
No
SMPL(PD)
No
No
NOP
NOP
No
No
NOP
COPY(RS)
No
No
NOP
NOP
No
No
NOP
COPY(RS-R)
NOP
OK
No
OK
2
No
No
NO
PSUE
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
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