Veritas Storage Foundation™ 5.0.1 for Oracle RAC Installation, Configuration, and Administrator's Guide Extracts for the HP Serviceguard Storage Management Suite on HP-UX 11i v3

4. Create a mirror of a volume:
# vxsnap -g diskgroup addmir volume_name alloc= diskname
There is no option for creating multiple mirrors at the same time. Only one mirror can be
created at a time.
5. List the available mirrors:
# vxprint -g diskgroup -F%name -e"pl_v_name in \"volume_name\""
The following two steps enable database FlashSnap to locate the correct mirror plexes when
creating snapshots.
6. Set the dbed_flashsnap tag for the data plex you want to use for breaking off the mirror.
You can choose any tag name you like, but it needs to match the tag name specified in the
snapplan.
# vxedit -g diskgroup set putil2=dbed_flashsnap plex_name
7. Verify that the dbed_flashsnap tag has been set to the desired data plex:
# vxprint -g diskgroup -F%name -e"pl_v_name in \"volume_name\" \ &&
p2 in \"dbed_flashsnap\""
If you require a backup of the data in the snapshot, use an appropriate utility or operating system
command to copy the contents of the snapshot to tape or to some other backup medium.
This example shows the steps involved in creating a snapshot mirror for the volume data_vol
belonging to the disk group PRODdg.
1. Prepare the volume data_vol for mirroring:
# vxsnap -g PRODdg prepare data_vol alloc=PRODdg01
2. Verify that FastResync is enabled:
# vxprint -g PRODdg -F%fastresync data_vol on
3. Verify that a DCO and a DCO log are attached to the volume:
# vxprint -g PRODdg -F%hasdcolog data_vol on
4. Create a snapshot mirror of data_vol:
# vxsnap -g PRODdg addmir data_vol alloc=PRODdg02
5. List the data plexes:
# vxprint -g PRODdg -F%name -e"pl_v_name in \"data_vol\"" data_vol-01
data_vol-02
6. Choose the plex that is in the snapdone state. Use the vxprint -g diskgroup command
to identify the plex that is in the snapdone state.
7. Decide which data plex you want to use and set the dbed_flashsnap tag for it:
# vxedit -g PRODdg set putil2=dbed_flashsnap data_vol-02
8. Verify that the dbed_flashsnap tag has been set to the desired data plex, data_vol-02:
# vxprint -g PRODdg -F%name -e"pl_v_name in \"data_vol\" \ && p2 in
\"dbed_flashsnap\"" data_vol-02
9. To verify that the snapshot volume was created successfully, use the vxprint -g dg
command as follows:
# vxprint -g PRODdg
TY NAME ASSOC KSTATE LENGTH PLOFFS STATE TUTIL0 PUTIL0
dg PRODdg PRODdg - - - - - -
dm PRODdg01 Disk_1 - 71117760 - - - -
dm PRODdg02 Disk_2 - 71117760 - - - -
dm PRODdg03 Disk_3 - 71117760 - - - -
56 Using FlashSnap for Backup and Recovery