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Date:      Fri, 3 Sep 2004 14:57:34 -0400 (EDT)
From:      Jerry McAllister <jerrymc@clunix.cl.msu.edu>
To:        dkelly@HiWAAY.net (David Kelly)
Cc:        "<" <freebsd-questions@freebsd.org>
Subject:   Re: Tape drive
Message-ID:  <200409031857.i83IvZo04219@clunix.cl.msu.edu>
In-Reply-To: <D5CE135E-FDD3-11D8-ABB5-000393BB56F2@HiWAAY.net> from "David Kelly" at Sep 03, 2004 01:05:27 PM

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> 
> 
> On Sep 3, 2004, at 11:56 AM, Joe Stuart wrote:
> 
> > I'm trying to backup to tape, but everything I try I get device not
> > configured.
> >
> > tar -c /home/joe
> > tar: /dev/sa0: Cannot open: Device not configured
> >
> > mt -f /dev/sa0 rewind
> > mt: /dev/sa0: Device not configured
> >
> > The device is on and loaded with tapes. Below is the output that is in
> > the messages log when the server boots, so I'm assuming the server sees
> > the tape drive alright. Any help is appreciated.
> 
> "tapes" plural? Its a jukebox/changer? If so then the problem is that 
> you haven't completed the process to cause a tape to load in the drive. 
> Can't help other than recommending the man page for ch(4).
> 
> I have a similar Archive SCSI DAT drive which produces the same "Device 
> not configured" message when a tape is not loaded, or not yet ready 
> after being inserted.

I will add my 'me too' here.  On some machines, we get that with
various models of DAT drives.   Generally, though, it is with our
program that writes a header file directly to the tape before
the backup.   Then, if I switch it to use tar to write the header
file, it works OK.   But, sometimes even the tar won't write.
I really suspect there is some weirdness in the driver vs the 
controller for some tape drives that isn't handled well.  But, I
am not up to tinking the drivers.

////jerry

> 
> --
> David Kelly N4HHE, dkelly@HiWAAY.net
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