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| Reattaching plexes | ||
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When a mirror plex encounters irrecoverable errors, Veritas Volume Manager (VxVM) detaches the plex from the mirrored volume. An administrator may also detach a plex manually using a utility such as vxplex or vxassist. In order to use a plex that was previously attached to a volume, the plex must be reattached to the volume. The reattach operation also ensures that the plex mirror is resynchronized to the other plexes in the volume.
See Plex synchronization.
The following methods are available for reattaching plexes:
By default, VxVM automatically reattaches the affected mirror plexes when the underlying failed disk or LUN becomes visible. When VxVM detects that the device is online, VxVM automatically recovers the volume components on the involved LUN. VxVM resynchronizes the plex and the mirror becomes available.
If the automatic reattachment feature is disabled, you need to reattach the plexes manually. You may also need to manually reattach the plexes for devices that are not automatically reattached. For example, VxVM does not automatically reattach plexes on site-consistent volumes.