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Date: Wed, 28 Jan 2009 16:34:51 -0600
From: David Kelly <dkelly@hiwaay.net>
To: Jaime <jaime@snowmoon.com>
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Cc: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>,
	Dan Nelson <dnelson@allantgroup.com>, freebsd-questions@freebsd.org
Subject: Re: Quantum tape drive
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On Wed, Jan 28, 2009 at 05:06:55PM -0500, Jaime wrote:
> On Wed, Jan 28, 2009 at 4:51 PM, Wojciech Puchar
> >
> > TERMINATION PROBLEM
> 
> I was thinking of that...  I shut down the server and checked the
> usual suspects (terminator on the cable, SCSI IDs, etc.) but didn't
> find anything out of place.  Also, the same command in Knoppix (Linux)
> using /dev/st0 (the Linux equivalent of /dev/sa0) appeared to write to
> the tape and then list the items on that tape.  I didn't see how long
> it would take, though.  In retrospect, maybe I should have let that
> run longer.  :(
> 
> How certain are you that its a termination problem?

I'm tending to "certainly" agree.

There are other things to consider as well, such as narrow, wide, ultra,
and ultra-LVDT. Active termination and passive termination.

Is there termination at the SCSI card?

You said there was termination on the cable, but is there also on-board
termination on the drive?

No other drive on the bus has termination enabled?

One terminator on each end of the bus, no more, no less.

-- 
David Kelly N4HHE, dkelly@HiWAAY.net
========================================================================
Whom computers would destroy, they must first drive mad.