I have an ADIC 4mm DAT changer - 12 slot, single HP DDS-I drive.

I'm running Linux (RH 7.3) and have installed kernel 2.4.18
w/scsi-changer patch. I can manipulate the robot with the "mover"
utility that came with scsi-changer. I can eject, rewind, erase, load,
etc. the drive with the Linux mt command. I have even written a file to
tape with dd.

The first problem was that the built-in SCSI changer scripts/programs
that came with Amanda would not work, so I wrote my own script that uses
mover and mt to move the arm, load, and unload tapes and return the
required return codes and strings to Amanda. So now I can use the
following commands with no problems:

amtape csd reset
amtape csd eject
amtape csd slot <N>


amlabel does not work.

The first problem was (is?) that rewind would ALWAYS fail. I found that
the mt eject command will always rewind a tape even if I use the
no-rewind device. The ioctl() call within tapeio.c always returns a -1.

The second problem is that even though "amlabel csd csd00<n> slot <n>",
where <n> is a digit, seems to work (no errors are returned), trying to
read the label from a tape fails. For example, "amtape csd show" always
returns the following:

[root@ista root]# amtape csd show
amtape: scanning all 12 slots in tape-changer rack:
slot 2: reading label: Input/output error
slot 3: reading label: Input/output error
slot 4: reading label: Input/output error
slot 5: reading label: Input/output error
slot 6: reading label: Input/output error
slot 7: reading label: Input/output error
slot 8: reading label: Input/output error
slot 9: reading label: Input/output error
slot 10: reading label: Input/output error
slot 11: reading label: Input/output error
slot 0: reading label: Input/output error

So, I am at a loss and what I thought should be easy has become a real
pain.

PGA
-- 
Paul G. Allen
Owner, Sr. Engineer, Security Specialist
Random Logic/Dream Park
www.randomlogic.com