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SubjectProblems with Quantum DLT 4000 + HP C5173-4000


I hope the problem I am posting is appropriate for this forum.

We have a Quantum DLT 4000 SCSI-2 tape device connected to a
RedHat Linux 7.1 box using BusLogic BT-950 card.

When the system boots, we get the following messages on the

Vendor: HP Model: C5173-4000 Media Changer Rev: 3.02
Vendor: Quantum Model: DLT4000 Rev: CD3C

The /var/log/messages file shows the following message:

st0: Block limits 1-16777215 bytes.

When I use the mtx utility on /dev/sg0, things are OK. I am
able to do 'inquiry', 'status', 'load', 'unload' operations

I put a tape cartridge into the drive by using the command

mtx -f /dev/sg0 load 1

Then I use the mt command as below:

mt -f /dev/st0 status

the output is:

SCSI 2 tape drive:

File number = 0, block number=0, partition=0
Tape block size 0 bytes, Density code 0x1a
(unknown to this mt)
Soft error count since last status=0
General status bits on (41010000):

I am using HP 1/2" DLTtape IV Data cartridge.

When I try to do a tar onto the tape, I get the message:

Wrote only 0 of 10240 bytes
Error is not recoverable: exiting now

The tape unit was attached to an HP9000 system before. The
HP DLTtape IV cartridges are recommended for this drive.
I thought there may something wrong with the particular
cartridge and so I even tried brand new cartridges. The
results are the same every time.

Can someone please help me understand the problem here ?
I hope to benefit from someone else's experience in this

Thanks for your time.


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