Veritas Volume Manager 4.1 Administrator's Guide (HP-UX 11i v3, February 2007)

Chapter 6, Creating and Administering Plexes
Displaying Plex Information
187
SNAPDONE Plex State
The SNAPDONE plex state indicates that a snapshot plex is ready for a snapshot to be
taken using vxassist snapshot.
SNAPTMP Plex State
The SNAPTMP plex state is used during a vxassist snapstart operation when a
snapshot is being prepared on a volume.
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.