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Date:      Thu, 2 Mar 2000 12:19:47 -0500 (EST)
From:      <up@3.am>
To:        Matthew Jacob <mjacob@feral.com>
Cc:        scsi@FreeBSD.ORG
Subject:   Re: Can't see DLT4000
Message-ID:  <Pine.BSF.4.10.10003021218300.5396-100000@richard2.pil.net>
In-Reply-To: <Pine.BSF.4.10.10003020913280.86005-100000@beppo.feral.com>

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On Thu, 2 Mar 2000, Matthew Jacob wrote:

> Don't mix differential with single ended. It's an electrical thing- it's very
> bad to mix the two- you run the risk of damaging the SE components.

ok...but what if they're on a separate SCSI bus?  I have the hard drives
on channel A (LVD ultra everything) and the tape drive *alone* on channel
B.  Does that make a difference?

> On Thu, 2 Mar 2000 up@3.am wrote:
> 
> > 
> > I just upgraded our tape drive from a DDS-2 DAT to a Quantum DLT4000 and
> > can't seem to get the system to see the DLT, no matter what.  If I switch
> > back to the DDS2 and reboot, mt sees it fine.  A rundown:
> > 
> > Both are External SCSI drives set to SCSI ID 4
> > 
> > used the same terminator and cable
> > 
> > I've rebooted several times
> > 
> > The SCSI host adapter is an on-board Adaptec AIC-7896 (Intel L440GX+)
> > using the second (B) SCSI bus.  When I have the DDS-2 drive hooked up, the
> > server's drive light functions normally (blinks when accessed), when I
> > hook up the DLT, it just stays on.
> > 
> > The only difference I can see is that the DLT is "differential" SCSI,
> > which, AFAIK, just allows it to work with a longer bus.  Is there
> > something that has to be done to the host adapter to accomodate
> > differential devices?
> > 
> > TIA,
> > 
> > James Smallacombe		      PlantageNet, Inc. CEO and Janitor
> > up@3.am							    http://3.am
> > =========================================================================
> > 
> > 
> > 
> > To Unsubscribe: send mail to majordomo@FreeBSD.org
> > with "unsubscribe freebsd-scsi" in the body of the message
> > 
> 
> 

James Smallacombe		      PlantageNet, Inc. CEO and Janitor
up@3.am							    http://3.am
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