VERITAS Volume Manager 4.1 Administrator's Guide

Creating and Administering Plexes
Displaying Plex Information
Chapter 6216
STALE Plex State
If there is a possibility that a plex does not have the complete and
current volume contents, that plex is placed in the STALE state. Also, if
an I/O error occurs on a plex, the kernel stops using and updating the
contents of that plex, and the plex state is set to STALE.
A vxplex att operation recovers the contents of a STALE plex from an
ACTIVE plex. Atomic copy operations copy the contents of the volume to
the STALE plexes. The system administrator can force a plex to the
STALE state with a vxplex det operation.
TEMP Plex State
Setting a plex to the TEMP state eases some plex operations that cannot
occur in a truly atomic fashion. For example, attaching a plex to an
enabled volume requires copying volume contents to the plex before it
can be considered fully attached.
A utility sets the plex state to TEMP at the start of such an operation
and to an appropriate state at the end of the operation. If the system fails
for any reason, a TEMP plex state indicates that the operation is
incomplete. A later vxvol start dissociates plexes in the TEMP state.
TEMPRM Plex State
A TEMPRM plex state is similar to a TEMP state except that at the
completion of the operation, the TEMPRM plex is removed. Some
subdisk operations require a temporary plex. Associating a subdisk with
a plex, for example, requires updating the subdisk with the volume
contents before actually associating the subdisk. This update requires
associating the subdisk with a temporary plex, marked TEMPRM, until
the operation completes and removes the TEMPRM plex.
If the system fails for any reason, the TEMPRM state indicates that the
operation did not complete successfully. A later operation dissociates and
removes TEMPRM plexes.
TEMPRMSD Plex State
The TEMPRMSD plex state is used by vxassist when attaching new data
plexes to a volume. If the synchronization operation does not complete,
the plex and its subdisks are removed.