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Date:      Fri, 12 Mar 1999 08:39:59 -0800 (PST)
From:      Matthew Jacob <mjacob@feral.com>
To:        Stephen McKay <syssgm@detir.qld.gov.au>
Cc:        freebsd-scsi@FreeBSD.ORG
Subject:   Re: Strange SCSI QIC tape behaviour
Message-ID:  <Pine.LNX.4.04.9903120837550.216-100000@feral-gw>
In-Reply-To: <199903121057.UAA24445@nymph.detir.qld.gov.au>

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> So, I removed the tape, and inserted it again.  Same write failures.
> 
> Then I set the blocksize back to variable.  Wrote /kernel on to it with dd
> and it succeeded, but wrote very slowly (38KB/s).  So, I rewound it, set it
> back to 1024 byte block size, and it worked like there had never been any
> problem at all!
> 
> So, is this the most bizarre drive on Earth, or perhaps are there bugs in
> the SCSI tape driver that need addressing?  At the very least, the fixed
> block size for QIC tapes should be 1024 not 512 for densities above QIC-320.

Yes, that's a bug for me to address. Where is this piece of information
from?

> 
> Tandberg has a nice SCSI manual for their drive (though it's hard to find
> on their web site).  Thus, I am armed with raw data, but no understanding
> of the current code.  
> 

-matt





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