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Date:      Sun, 14 Dec 1997 18:03:44 +0100
From:      J Wunsch <j@uriah.heep.sax.de>
To:        freebsd-scsi@FreeBSD.ORG
Cc:        Jim Riffle <rif@rif.hoosierlink.net>
Subject:   Re: possiable quirk with CTT8000-S Tape Drive
Message-ID:  <19971214180344.18122@uriah.heep.sax.de>
In-Reply-To: <Pine.BSF.3.96.971211234336.2135A-100000@rif.hoosierlink.net>; from Jim Riffle on Thu, Dec 11, 1997 at 11:50:56PM -0500
References:  <Pine.BSF.3.96.971211205834.610A-100000@rif.hoosierlink.net> <Pine.BSF.3.96.971211234336.2135A-100000@rif.hoosierlink.net>

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As Jim Riffle wrote:

> > (aic0:0:0): "CONNER CTT8000-S 1.17" type 1 removable SCSI 2
> > st0(aic0:0:0): Sequential-Access density code 0x45,  drive empty

That tape drive is a Travan tape?  From previous reports, i've got the
impression that the SCSI implementation of these drives is of very
poor quality.  Your drive seems to support this suspicion.

> st0(aic0:0:0): command: 10,0,0,0,1,0-[0 bytes]

That's a WRITE FILEMARKS command, requesting the drive to write one
filemark.

> st0(aic0:0:0): ILLEGAL REQUEST asc:80,81 Vendor Specific ASC

...which the drive choses to not implement, apparently.  Even more,
they're using a private ASC/ASCQ, why the heck?

WRITE FILEMARKS is flagged `mandatory' in the SCSI-2 specs.  If your
drive doesn't implement it, it can't be called `SCSI'.  Return it to
the vendor, or request a functional firmware agreeing with the
standard.

-- 
cheers, J"org

joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)



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