Veritas Volume Manager 5.0 Administrator's Guide (September 2006)

218 Creating and administering plexes
Displaying plex information
EMPTY plex state
Volume creation sets all plexes associated with the volume to the EMPTY state to indicate
that the plex is not yet initialized.
IOFAIL plex state
The IOFAIL plex state is associated with persistent state logging. When the vxconfigd
daemon detects an uncorrectable I/O failure on an ACTIVE plex, it places the plex in the
IOFAIL state to exclude it from the recovery selection process at volume start time.
This state indicates that the plex is out-of-date with respect to the volume, and that it
requires complete recovery. It is likely that one or more of the disks associated with the
plex should be replaced.
LOG plex state
The state of a dirty region logging (DRL) or RAID-5 log plex is always set to LOG.
OFFLINE plex state
The vxmend off task indefinitely detaches a plex from a volume by setting the plex state
to OFFLINE. Although the detached plex maintains its association with the volume,
changes to the volume do not update the OFFLINE plex. The plex is not updated until the
plex is put online and reattached with the vxplex att task. When this occurs, the plex is
placed in the STALE state, which causes its contents to be recovered at the next vxvol
start operation.
SNAPATT plex state
This state indicates a snapshot plex that is being attached by the snapstart operation. When
the attach is complete, the state for the plex is changed to SNAPDONE. If the system fails
before the attach completes, the plex and all of its subdisks are removed.
SNAPDIS plex state
This state indicates a snapshot plex that is fully attached. A plex in this state can be turned
into a snapshot volume with the
vxplex snapshot command. If the system fails before
the attach completes, the plex is dissociated from the volume. See the
vxplex(1M)
manual page for more information.
SNAPDONE plex state
The SNAPDONE plex state indicates that a snapshot plex is ready for a snapshot to be
taken using vxassist snapshot.