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    SubjectProblem, SCSI tape backup

    Hi,
    I've been having a problem with my SCSI-2 tape backup for some time now...
    The tape is an Exabytes 2501 (750 Megs, 1/4"), controller is an Adaptec
    AHA-1542C, and hard disk is a Fujitsu 1 gig SCSI-2 one.

    When backuping, I use 'tar'. If the backup fits on one tape, I have no
    problem to backup/restore. But if the backup takes more than one tape
    (for example, the 1-gig disk...), tar just does with a segfault when
    doing a restore/list.

    switches used to backup:
    tar -cvMf /dev/st0
    I've tried using '-L 750000' but it makes no difference.

    switches used to list the backup:
    tar -tMf /dev/st0

    I'm using the kernel 1.3.71, and I've been having this problem since at
    least 1.3.25 (I didn't really try any 1.3 kernel before that).
    I think it used to work with 1.2.11, but I'm unable to compile those
    kernels since I went ELF, so I can't really say.

    result of 'mt status' with no tape inserted :
    -----
    SCSI 2 tape drive, residual=0
    File number=0, block number=0.
    Tape block size 0 bytes. Density code 0x0 (default).
    Soft error count since last status=0
    General status bits on (44040000):
    BOT WR_PROT DR_OPEN
    -----

    result of 'mt status' with tape inserted :
    -----
    SCSI 2 tape drive, residual=0
    File number=0, block number=0.
    Tape block size 1024 bytes. Density code 0x92 (unknown).
    Soft error count since last status=0
    General status bits on (41000000):
    BOT ONLINE
    -----

    contents of /proc/scsi/scsi :
    -----
    Attached devices:
    Host: scsi0 Channel: 00 Id: 01 Lun: 00
    Vendor: FUJITSU Model: M2694ES-512 Rev: 8134
    Type: Direct-Access ANSI SCSI revision: 02
    Host: scsi0 Channel: 00 Id: 05 Lun: 00
    Vendor: EXABYTE Model: EXB-2501 Rev: 2200
    Type: Sequential-Access ANSI SCSI revision: 02
    -----

    Any other info needed ? I really need to get this tape backup running, so
    I'm willing to test about anything...

    Christophe Dupre Universite de Montreal
    Internet: duprec@jsp.umontreal.ca Qc, Canada
    Montreal, Qc, Canada
    "Nous ne sommes pas libres de ne pas etre libres, nous sommes obliges de
    l'etre" - Fernando Savater

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