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To: freebsd-hardware@freebsd.org
From: "C. O'Donnell" <office@bus.net>
Subject: QIC-3080: density & length
Sender: owner-hardware@freebsd.org
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OK - I'm ready for help.

I have purchased a Conner TSM4000R SCSI tape backup unit. I have found this unit
mentioned several times in questions in the mail archives, but unfortunately the
replies must have been sent directly, and not forwarded to the list.

Specs:

        2G capacity uncompressed
        4G compressed (software compression - can't use)
        QIC-3080 tape format
        neato flashing LED indicator

mt:
        #mt -f /dev/rst0 status
        Present Mode:   Density = 0x29         Blocksize variable
        ---------available modes---------
        Mode 0:         Density = 0x00         Blocksize variable
        Mode 1:         Density = 0x00         Blocksize variable
        Mode 2:         Density = 0x00         Blocksize variable
        Mode 3:         Density = 0x00         Blocksize variable


dmesg:
        .
        .
        .
        aic0 at 0x340-0x35f irq 11 on isa
        aic0 waiting for scsi devices to settle
        (aic0:0:0): "HP C3724S 5153" type 0 fixed SCSI 2
        sd0(aic0:0:0): Direct-Access 1149MB (2354660 512 byte sectors)
        (aic0:1:0): "CONNER CTMS  3200 7.00" type 1 removable SCSI 2
        st0(aic0:1:0): Sequential-Access density code 0x0,  drive empty
        .
        .
        .


Q:      How do I derive the BPI and length of the tape for dump?

Q:      How can I tell if this is a rewinding or non-rewinding unit (i.e. should
        I use /dev/nrst0 or /dev/rst0)?


Please email if you need any additional information.

Please email respones directly and I will compile and submit a final solution to
the mailing list for archive purposes.

Thanks,

Chuck O'Donnell

chuck@bus.net

----------------------------------------------------------------------------
--------
P.S. For those of you who have been dragging your feet in purchasing a UPS
and tape
backup, here's the rest of the dmesg output from above:

        .
        .
        changing root device to sd0a
        sd0(aic0:0:0): MEDIUM ERROR info:6f08b asc:11,0 Unrecovered read error
        , retries:4
        sd0(aic0:0:0): MEDIUM ERROR info:6f08b asc:11,0 Unrecovered read error
        , retries:3
        sd0(aic0:0:0): MEDIUM ERROR info:6f08b asc:11,0 Unrecovered read error
        , retries:2
        sd0(aic0:0:0): MEDIUM ERROR info:6f08b asc:11,0 Unrecovered read error
        , retries:1
        sd0(aic0:0:0): MEDIUM ERROR info:6f08b asc:11,0 Unrecovered read error
        , FAILURE