Veritas Volume Manager 5.0 Administrator's Guide (September 2006)

11Contents
Resizing volumes using vxvol ........................................................................279
Setting tags on volumes ..........................................................................................280
Changing the read policy for mirrored volumes .....................................................281
Removing a volume ................................................................................................282
Moving volumes from a VM disk ...........................................................................282
Enabling FastResync on a volume ..........................................................................284
Checking whether FastResync is enabled on a volume ..................................285
Disabling FastResync .....................................................................................285
Performing online relayout .....................................................................................286
Permitted relayout transformations .................................................................287
Specifying a non-default layout ......................................................................290
Specifying a plex for relayout .........................................................................290
Tagging a relayout operation ..........................................................................290
Viewing the status of a relayout .....................................................................291
Controlling the progress of a relayout ............................................................291
Converting between layered and non-layered volumes ..........................................292
Chapter 9 Administering volume snapshots
Traditional third-mirror break-off snapshots ..........................................................297
Full-sized instant snapshots ....................................................................................299
Space-optimized instant snapshots .........................................................................301
Emulation of third-mirror break-off snapshots .......................................................302
Linked break-off snapshot volumes ........................................................................303
Cascaded snapshots .................................................................................................304
Creating a snapshot of a snapshot ...................................................................305
Creating multiple snapshots ....................................................................................309
Restoring the original volume from a snapshot ......................................................309
Creating instant snapshots ......................................................................................311
Preparing to create instant and break-off snapshots .......................................313
Creating and managing space-optimized instant snapshots ............................316
Creating and managing full-sized instant snapshots .......................................319
Creating and managing third-mirror break-off snapshots ...............................321
Creating and managing linked break-off snapshot volumes ...........................323
Creating multiple instant snapshots ................................................................325
Creating instant snapshots of volume sets ......................................................326
Adding snapshot mirrors to a volume .............................................................328
Removing a snapshot mirror ...........................................................................328
Removing a linked break-off snapshot volume ..............................................329
Adding a snapshot to a cascaded snapshot hierarchy .....................................329
Refreshing an instant snapshot .......................................................................329
Reattaching an instant snapshot ......................................................................330
Reattaching a linked break-off snapshot volume ............................................331
Restoring a volume from an instant snapshot .................................................332