Veritas Volume Manager 5.0.1 Administrator's Guide, HP-UX 11i v3, First Edition, November 2009

Stop the cache object:

# vxcache -g diskgroup stop cache_object

Finally, remove the cache object and its cache volume:

# vxedit -g diskgroup -r rm cache_object

Creating traditional third-mirror break-off snapshots

Note: You need a full license to use this feature.

VxVM provides third-mirror break-off snapshot images of volume devices using

vxassist and other commands.

To enhance the efficiency and usability of volume snapshots, turn on FastResync.

See “Enabling FastResync on a volume” on page 338.

If Persistent FastResync is required, you must associate a version 0 DCO with the

volume.

See “Adding a version 0 DCO and DCO volume” on page 405.

A plex is required that is large enough to store the complete contents of the volume.

Alternatively, you can use space-optimized instant snapshots.

See “Creating and managing space-optimized instant snapshots” on page 371.

The recommended approach to performing volume backup from the command

line, or from a script, is to use the vxassist command. The vxassist snapstart,

snapwait, and snapshot tasks allow you to back up volumes online with minimal

disruption to users.

The vxassist snapshot procedure consists of two steps:

■ Run vxassist snapstart to create a snapshot mirror.

■ Run vxassist snapshot to create a snapshot volume.

The vxassist snapstart step creates a write-only backup plex which gets attached

to and synchronized with the volume. When synchronized with the volume, the

backup plex is ready to be used as a snapshot mirror. The end of the update

procedure is indicated by the new snapshot mirror changing its state to

SNAPDONE. This change can be tracked by the vxassist snapwait task, which

waits until at least one of the mirrors changes its state to SNAPDONE. If the attach

process fails, the snapshot mirror is removed and its space is released.

Administering volume snapshots

Creating traditional third-mirror break-off snapshots

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