Veritas Storage Foundation™ and High Availability Solutions ...

92Storage Foundation and High Availability Solutions support for Oracle VM Server for SPARCUsing Veritas Volume Manager snapshots for cloning logical domain boot disks2 To create a third-mirror break-off snapshot, use the following form of thevxsnap make command.Caution: Shut down the guest domain before executing the vxsnap commandto take the snapshot.primary# vxsnap [-g diskgroup] make \source=volume[/newvol=snapvol] \{/plex=plex1[,plex2,...]|/nmirror=number]}Either of the following attributes may be specified to create the new snapshotvolume, snapvol, by breaking off one or more existing plexes in the originalvolume:plexSpecifies the plexes in the existing volume that are to be broken off. Thisattribute can only be used with plexes that are in the ACTIVE state.nmirrorSpecifies how many plexes are to be broken off. This attribute can only beused with plexes that are in the SNAPDONE state. Such plexes could havebeen added to the volume by using the vxsnap addmir command.Snapshots that are created from one or more ACTIVE or SNAPDONE plexesin the volume are already synchronized by definition.For backup purposes, a snapshot volume with one plex should be sufficient.For example,primary# vxsnap -g boot_dg make \source=bootdisk1-vol/newvol=SNAP-bootdisk1-vol/nmirror=1Here bootdisk1-vol makes source; SNAP-bootdisk1-vol is the new volume and1 is the nmirror value.The block device for the snapshot volume will be/dev/vx/dsk/boot_dg/SNAP-bootdisk1-vol.3 Configure a service by exportingthe/dev/vx/dsk/boot_dg/SNAP-bootdisk1-volfile as a virtual disk.primary# ldm add-vdiskserverdevice \/dev/vx/dsk/boot_dg/SNAP-bootdisk1-vol vdisk2@primary-vds0