Air Cleaner User Manual

Verifying Files on System Backup
It is often a good idea to verify all of the data on a backup to ensure that the
backup was written properly. For backups containing multiple data options, such
as multiple volume groups or multiple filesystems, you can verify all or part of the
backup. For instance, if you created a system backup containing multiple volume
groups, you can verify one volume group, multiple volume groups, or all volume
groups on the backup. Likewise, for a logical volume backup containing multiple
logical volumes, you can verify one or more logical volumes. This process actually
reads the backup images and may provide a list of files that are actually contained
on the backup media. You may use this listing to compare to the table of contents
listing creating by executing section “Listing Backup Contents” on page 18-1to
determine if discrepancies exist.
To verify data on a backup:
1. From the Backup & Recovery Options menu, select Verify a Backup.
Note: From a command line, type smit sb_verify.
2. On the Device Selector screen, highlight the device you want to use and press
Enter.
3. If you selected a tape drive or virtual device, enter the backup sequence
number. The default value is “1,” indicating that the backup to be verified is
the first backup on the media. If you stacked multiple sequential backups on
the media and want to verify a different backup, type the backup number and
press Enter.
4. Next, the backup is read to determine the backup type. If the backup is not a
file or directory backup, you are asked to select the data to be verified. A list of
verify options appear, dependent on the backup type. For instance, if this is a
volume group backup, the list includes volume groups to verify. If this is a
filesystem backup, the list includes filesystems. To select a single option to
verify, highlight the option and press Enter. To select multiple options, highlight
each line and press F7. When all selections have been made, press Enter to
continue.
5. The following screen shows the default options and values that appear when
you verify the contents of a volume group backup of vg00 from a local tape
drive:
Chapter 18. Listing or Verifying Backups 18-3