[8229] in linux-scsi channel archive
Re: New to U2W/LVD and termination
daemon@ATHENA.MIT.EDU (Jeffrey B. Siegal)
Fri Feb 25 04:14:38 2000
Message-ID: <38B63944.E37DA830@quiotix.com>
Date: Fri, 25 Feb 2000 00:11:48 -0800
From: "Jeffrey B. Siegal" <jbs@quiotix.com>
MIME-Version: 1.0
To: Brendan Miller <brmiller@netgate.net>
Cc: linux-scsi@vger.rutgers.edu
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Brendan Miller wrote:
> Now most U2W drives can run in
> "UW, single-ended" compatibility mode, right?
All, as far as I know.
> - single-ended, passive terminator
> - single-ended, active terminator
> - LVD, multi-mode terminator
> - LVD, single-mode terminator
>
> I'm only running the drive in single-ended mode, so a single-ended,
> active terminator would work, right?
Yes. Don't mess with the passive terminator.
> If I get an LVD controller
> someday, would I use one of the LVD terminators?
Yes. Unless every device on the bus is LVD, including the terminator, it will
fall back to SE operation. Not only is this slower, but less reliable and
more subject to cabling problems (especially at Ultra speed).
> Is there a terminator
> I can buy today that will work in both single-ended and LVD
> applications?
Yes, that's probably what they mean by "multi-mode." I wasn't aware there
were LVD-only terminators that couldn't fall-back to SE, though.
-
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majordomo@vger.rutgers.edu
