VERITAS Volume Manager 4.1 Administrator's Guide

Administering Volumes

Displaying Volume Information

Chapter 8 265

EMPTY Volume State

The volume contents are not initialized. The kernel state is always

DISABLED when the volume is EMPTY.

NEEDSYNC Volume State

The volume requires a resynchronization operation the next time it is

started. For a RAID-5 volume, a parity resynchronization operation is

required.

REPLAY Volume State

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. This

state is only applied to RAID-5 volumes.

SYNC Volume State

The volume is either in read-writeback recovery mode (kernel state is

currently ENABLED) or was in read-writeback mode when the machine

was rebooted (kernel state is DISABLED). With read-writeback recovery,

plex consistency is recovered by reading data from blocks of one plex and

writing the data to all other writable plexes. If the volume is ENABLED,

this means that the plexes are being resynchronized through the

read-writeback recovery. If the volume is DISABLED, it means that the

plexes were being resynchronized through read-writeback when the

machine rebooted and therefore still need to be synchronized.

For a RAID-5 volume, 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).

NOTE The interpretation of these ﬂags during volume startup is modiﬁed by

the persistent state log for the volume (for example, the DIRTY/CLEAN

ﬂag). If the clean ﬂag is set, an ACTIVE volume was not written to by

any processes or was not even open at the time of the reboot; therefore, it

can be considered CLEAN. The clean ﬂag is always set in any case where

the volume is marked CLEAN.