Veritas Volume Manager 4.1 Administrator's Guide (HP-UX 11i v3, February 2007)

Taking Plexes Offline
190 VERITAS Volume Manager Administrator’s Guide
For example, to create a mirrored, fsgen-type volume named home, and to associate two
existing plexes named home-1 and home-2 with home, use the following command:
# vxmake -g mydg -U fsgen vol home plex=home-1,home-2
Note You can also use the command vxassist mirror volume to add a data plex as a
mirror to an existing volume.
Taking Plexes Offline
Once a volume has been created and placed online (ENABLED), VxVM can temporarily
disconnect plexes from the volume. This is useful, for example, when the hardware on
which the plex resides needs repair or when a volume has been left unstartable and a
source plex for the volume revive must be chosen manually.
Resolving a disk or system failure includes taking a volume offline and attaching and
detaching its plexes. The two commands used to accomplish disk failure resolution are
vxmend and vxplex.
To take a plex OFFLINE so that repair or maintenance can be performed on the physical
disk containing subdisks of that plex, use the following command:
# vxmend [-g diskgroup] off plex
If a disk has a head crash, put all plexes that have associated subdisks on the affected disk
OFFLINE. For example, if plexes vol01-02 and vol02-02 in the disk group, mydg, had
subdisks on a drive to be repaired, use the following command to take these plexes offline:
# vxmend -g mydg off vol01-02 vol02-02
This command places vol01-02 and vol02-02 in the OFFLINE state, and they remain
in that state until it is changed. The plexes are not automatically recovered on rebooting
the system.