VERITAS Volume Manager 3.1 Administrator's Guide

Recovery
Plex and Volume States
Chapter 8 363
the volume is marked CLEAN.
RAID-5 Volume States
RAID-5 volumes have their own set of volume states, as follows:
CLEAN—The volume is not started (kernel state is DISABLED) and
its parity is good. The RAID-5 plex stripes are consistent.
ACTIVE—The volume has been started (kernel state is currently
ENABLED) or was in use (kernel state was ENABLED) when the
system was rebooted. If the volume is currently ENABLED, the state
of its RAID-5 plex at any moment is not certain (since the volume is
in use). If the volume is currently DISABLED, parity cannot be
guaranteed to be synchronized.
• EMPTY—The volume contents are not initialized. The kernel state is
always DISABLED when the volume is EMPTY.
• SYNC—The volume is either undergoing a parity resynchronization
(kernel state is currently ENABLED) or was having its parity
resynchronized when the machine was rebooted (kernel state is
DISABLED).
• NEEDSYNC—The volume requires a parity resynchronization
operation the next time it is started.
• REPLAY—The volume is in a transient state as part of a log replay. A
log replay occurs when it becomes necessary to use logged parity and
data.
Volume Kernel State
The volume kernel state indicates the accessibility of the volume. The
volume kernel state allows a volume to have an offline (DISABLED),
maintenance (DETACHED), or online (ENABLED) mode of operation.
The following are volume kernel states:
DISABLED—The volume cannot be accessed.
• DETACHED—The volume cannot be read or written, but plex device
operations and ioctl functions are accepted.
• ENABLED—The volumes can be read and written.