HP StoreEver Ultrium Tape Drives - Manual (Page 14)

Limitations
•
When the tape cartridge is almost full, further write operations will be prevented. The free
space on the tape (such as from the df command) will indicate that there is still some capacity
available, but that is reserved for updating the index when the tape is unmounted.
•
Future mounts of a cartridge that is almost full (has passed the point at which “early warning”
is reported) will mount as Read Only, to prevent further modifications which may not fit on
tape. This status is cleared when a cartridge is reformatted (using mkltfs) or when the volume
is rolled back, erasing history (using ltfsck).
•
MAM and LTFS attributes cannot be listed using the ltfsattr command. The LTFS and MAM
attributes are case sensitive
•
LTFS volume name cannot be modified on a LTFS tape which is full.
•
Disconnecting or powering off a tape drive while it is mounted can make the LTFS volume
inconsistent. Always un-mount the LTFS volume before disconnecting or powering down the
tape drive.
MAC OS X only
•
The ltfs program will currently always run in the foreground (equivalent to passing -f
option). This is done automatically and may be changed in future releases.
•
LTFS does not support moving a folder within LTFS. Any attempt to move a folder in such a
manner will result in an “operation not permitted” error, and the operation will be
ignored. The user can still move a file within LTFS, and the also move a folder to and fro
between an LTFS and a non-LTFS file system.
•
Mac OS X's Spotlight will not display the files on LTFS as a result of a search.
Removing LTFS format
If at some time in the future you wish to remove the LTFS format from the cartridge so that it can
be reused for a different purpose, use the unltfs utility.
CAUTION: This will irretrievably destroy all contents of the cartridge, so use it only when you
are sure that you wish to erase the LTFS volume.
unltfs options:
Specifies the tape drive to use. -d, --device=<name>
Omits normal verification steps, reformats without further prompting. -y, --justdoit
Ejects the tape after the operation completes successfully. –e, -—eject
Suppresses all progress output (Implies --force). –q, -—quiet
Displays detailed progress. –t, -—trace
Shows this help. –h, -—help
Overrides the default config file. –i, -—configure=<file>
Specifies a different tape backend subsystem. -b, --backend
Displays debug information (verbose). -x, --fulltrace
14 Using HP LTFS