Veritas Volume Manager 5.1 SP1 Administrator"s Guide (5900-1506, April 2011)

Putting a volume in maintenance mode
If all mirrors of a volume become STALE, you can place the volume in maintenance
mode. Before you put the volume in maintenance mode, make sure the volume is
stopped or it is in the DISABLED state. Then you can view the plexes while the
volume is DETACHED and determine which plex to use for reviving the others. To
place a volume in maintenance mode, use the following command:
# vxvol [-g diskgroup] maint volume
To assist in choosing the revival source plex, use vxprint to list the stopped
volume and its plexes.
To take a plex offline, (in this example, vol01-02 in the disk group, mydg), use the
following command:
# vxmend -g mydg off vol01-02
Make sure that all the plexes are offline except for the one that you will use for
revival. The plex from which you will revive the volume should be placed in the
STALE state. The vxmend on command can change the state of an OFFLINE plex of
a DISABLED volume to STALE. For example, to put the plex vol101-02 in the STALE
state, use the following command:
# vxmend -g mydg on vol101-02
Running the vxvol start command on the volume then revives the volume with
the specified plex. Because you are starting the volume from a stale plex, you must
specify the force option ( -f).
By using the procedure above, you can enable the volume with each plex, and you
can decide which plex to use to revive the volume.
After you specify a plex for revival, and you use the procedure above to enable
the volume with the specified plex, put the volume back into the DISABLED state
and put all the other plexes into the STALE state using the vxmend on command.
Now, you can recover the volume.
See “Starting a volume” on page 350.
Starting a volume
Starting a volume makes it available for use, and changes the volume state from
DISABLED or DETACHED to ENABLED. To start a DISABLED or DETACHED
volume, use the following command:
# vxvol [-g diskgroup] start volume ...
Administering volumes
Starting a volume
350