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226 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This state indicates that the plex is out-of-date with respect to the volume, and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.