HP P6000 Replication Solutions Manager User Guide (T3680-96089, October 2012)

A job that replicates a storage volume fails at a CreateHostVolume command when attempting
to create a host volume on an HP-UX enabled host. The replication manager logs a message such
as:
Unknown exception on host: Volume group /dev/h32xg02_RV0 failed to
create: Volume Group /dev/h32xg02_RV0 is still active.
Explanation / resolution
The HP-UX kernel recognizes device drivers and peripheral devices by major and minor numbers.
The driver uses minor numbers to locate specific devices. HP-UX sometimes does not release device
minor numbers after a volume group is removed. When the CreateHostVolume command is
run, the volume group appears to still be active and the command fails.
To resolve this issue, you must reboot the enabled host.
IMPORTANT: Before proceeding, coordinate the reboot activities to avoid disruption of host
services to others.
1. Ensure that no replication manager jobs involving the host are running or scheduled to run
during the reboot.
2. On the enabled host, close applications as appropriate.
3. Reboot the host.
This clears the device minor numbers for the host memory.
4. Restart applications on the host, as appropriate.
5. If necessary, clean up resources that were involved in the failed job.
6. Rerun the job.
Job with MountEntireVolumeGroup command fails–HP-UX
Problem
A job that replicates and mounts an HP-UX volume group fails at a MountEntireVolumeGroup
command when attempting to mount the volume group on an enabled host. The replication manager
logs a message such as:
Host Volume has unknown or incompatible ...
Explanation / resolution
This can occur when a job is rerun.
If the replication manager discovers an HP-UX volume group at the same time that a job command
is attempting to remove the volume group, an error allows the underlying storage to be unpresented
from the host, even though the volume group is still active.
When the job is run again, the volume group cannot be replicated and the job fails at the mount
step because there is no underlying storage available.
To resolve this issue:
1. In the replication manager or HP P6000 Command View, correct the presentation of the
underlying storage for the volume group.
2. If necessary, clean up resources that were involved in the failed job.
3. Rerun the job.
Host volume with PVLinks multipathing
Problem
If the source host volume uses HP-UX PVLinks for multiple paths, a replica will have only one path
defined.
Explanation / resolution
Troubleshooting 39