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Date:      Sat, 22 Sep 2001 09:51:41 -0500 (CDT)
From:      mark tinguely <tinguely@web.cs.ndsu.nodak.edu>
To:        ru@FreeBSD.ORG, smalta@fleximedia.pt
Cc:        questions@FreeBSD.ORG
Subject:   Re: dump error (with more details)
Message-ID:  <200109221451.f8MEpfT71519@web.cs.ndsu.nodak.edu>

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>  Umm, I take my words back.  The actual problem is with your tape,
>  sa0, so replace the tape:
>
>  > >    (sa0:ahc0:0:5:0):WRITE(06). CDB: a 1 0 0 40 0
>          ^^^             ^^^^^
>  > >    (sa0:ahc0:0:5:0):Deferred error: MEDIUM ERROR info: c0000 asc:15,2

I agree the problem could be with the tape, the drive could be
dirty also, use the head cleaner regularly. This can lead to a
worn head, that can give simular write errors.

A dirty head or worn tape will cause backup times to increase by orders
of magnitude, but it should not lock up the machine.

One last problem I have seen with tape drive go flakey and it locks the
SCSI board causing the machine to lock trying to access the prgrams/data
on the hard drive.

If cleaning the heads with the cleaning tape, and replacing the tape
do not work, try securing the SCSI cables, and lastly think about getting
the tape drive in for repair.

--mark.

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