HP LTFS Linear Tape File System user guide

Using HP LTFS to check the cartridge
Every time a cartridge is mounted onto the system, the HP LTFS application will perform a consistency
check to ensure that the index information is accurate and up-to-date with the data on the tape. If
for some reason there is a problem, the mount operation will fail.
In order to recover the tape to a consistent state, the ltfsck utility may be used to check and
repair the LTFS volume. The options to ltfsck are shown below; the only required parameter is
the device name (e.g. /dev/st0 on Linux) but the behavior of ltfsck can be controlled through
the following:
Usage: ltfsck filesys
where filesys is the device file for the tape drive
–g, —-generation=
–t, -—time=
–r, -—rollback
–n, -—no-rollback
–f, -–full-recovery
-z, --deep-recovery
–l, -–list-rollback-points
–j, -—erase-history
–k, -—keep-history
–q, -—quiet
–a, -—trace
–h, -—help
–p, -—advanced-help
Specify the generation to roll back
Specify the time to rollback. Time value should be "yyyy-mm-dd
HH:MM:SS.nanosec"
Rollback to the point specified by -g or -t
Do not roll back, just verify the point specified by -g or -t (Default)
Recover extra data blocks into directory _ltfs_lostandfound
Recover cartridge which has EOD missing. Note that some blocks may
be erased but recover to final unmount point which has an index version
"2.0.0" or earlier
List rollback points
Erase history at rollback
Keep history at rollback (Rollback)
Suppress informational messages
Enable function call tracing
This help
Full help, including advanced options
NOTE: The -z option should only be necessary when a mount operation has failed and ltfs
has advised that deep recovery is required.
Note also that the "erase history" operation cannot be undone, so this option should be used only
when you are sure that you need it.
16 Troubleshooting