VERITAS Volume Manager 4.1 Administrator's Guide

Creating and Administering Plexes
Taking Plexes Offline
Chapter 6 219
# vxmake [-g diskgroup] -U usetype vol volume
plex=plex1[,plex2...]
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 -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 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 had subdisks on a drive to be repaired, use the following
command to take these plexes offline:
# vxmend 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.