HP XP Continuous Access Software - Manual (Page 265)

Troubleshooting RAID Manager 265
Operational notes
Error Solution
Coexistence of Logical
Volume Manager (LVM)
mirror and CA When the LVM mirror and CA volumes are used together, the LVM
mirror handles write errors by switching LVM P-VOL volumes. Thus,
the fence level of mirrored P-VOLs used by the LVM must be set to
data
.
One instance of LVM must not be allowed to see both the P-VOL and
S-VOL of the same BC or CA pair. This will cause an LVM error in
that two volumes will contain the same LVM volume group ID.
If you wish to split and mount an S-VOL on the same host as the
P-VOL, you must first use the vgchgid command to give the S-VOL a
new LVM volume group ID.
Command device Each BC/CA command is executed by issuing a command to the
command device. The BC/CA command is read from or written from
or into a specific block area of the command device. Therefore, the
command device cannot be used by the user. In addition, this device
must not belong to an LVM volume group.
Duplicated write error (CA only) Check the error notification command or the syslog file to
identify the failed paired volume. Issue an RM command manually to
the identified failed paired volume to try to recover it.
If the secondary volume is the failed volume, issue the pairresync
command to recover it.
If the primary volume fails, delete or suspend the pair (pairsplit
command) and use the secondary volume as the primary volume, and
create another pair.
RM command termination
error (see the command log
file and RM log file for error
details.) If an RM command terminates abnormally because of a remote server
failure, recover the machine from the failure, and then reexecute the
RM command. If a hardware error occurs, read the log files and contact
the HP support center.
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