SDLT Tape formats?

Discussion in 'Storage' started by Steve Cousins, Sep 17, 2003.

  1. I just received a new case of tapes from Quantum for our SDLT 220 drive
    and they are all giving me troubles:

    [root@rocky backup]# mt setdensity 145

    [root@rocky backup]# tar cvSbf 1024 /dev/tape /usr2
    /bin/tar: Removing leading `/' from member names
    /bin/tar: /dev/tape: Wrote only 0 of 524288 bytes
    /bin/tar: Error is not recoverable: exiting now

    [root@rocky backup]# mt tell
    At block 0.

    [root@rocky backup]# mt status
    SCSI 2 tape drive:
    File number=0, block number=0, partition=0.
    Tape block size 0 bytes. Density code 0x91 (no translation).
    Soft error count since last status=0
    General status bits on (49010000):

    I'm able to do the same thing with my older (Quantum also) tapes with no
    problems at all.

    The new tapes are marked as SuperDLTtape 1 byt they also say 160/320 GB
    and then in smaller print 110/220 GB. I'm assuming the tapes haven't
    changed just the packaging.

    Is this just a bad batch of tapes or is something else going on? Has
    something changed in the tapes that makes me need to do something to get
    them to work in an SDLT 220 drive? If it matters I'm running Redhat 7.3
    with the 2.4.20-18.7smp kernel.


    Steve Cousins Email:
    Research Associate Phone: (207) 581-4302
    Ocean Modeling Group
    School of Marine Sciences 208 Libby Hall
    University of Maine Orono, Maine 04469
    Steve Cousins, Sep 17, 2003
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  2. I still don't know what the problem is with these tapes but I do have a
    solution. By doing "mt erase" it will make these tapes usable. Is this
    what we have to do now in order to get new SDLT 1 tapes to work in an SDLT
    220 drive?

    If so, they really shouldn't call them the same things. Someone previously
    mentioned that maybe they should be called SDLT 1.5 tapes. I agree. What a
    pain. I guess you have to specify "SDLT 220 specific SDLT 1 tapes please"
    (if they even exist any more) in order to not have to spend two days
    reformating the damned things.

    Oh well. I guess if this is the worst of my problems right now I should
    count myself lucky.

    Steve Cousins, Sep 19, 2003
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