[8520] in linux-scsi channel archive
Re: Fast Wide vs Ultra Wide
daemon@ATHENA.MIT.EDU (Dan Jones)
Mon Apr 3 18:43:45 2000
Message-ID: <38E91DA3.373AAD05@valinux.com>
Date: Mon, 03 Apr 2000 15:39:31 -0700
From: Dan Jones <djones@valinux.com>
MIME-Version: 1.0
To: Matthew Dharm <mdharm-scsi@one-eyed-alien.net>
Cc: The Linux SCSI list <linux-scsi@vger.rutgers.edu>
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Matthew Dharm wrote:
>
> Interesting... according to all these responses, I should be able to use
> this hardware.
>
> For reference, I'm not using newer drives. This is all second-hand
> equipment.
>
> I've got a Mylex DAC960PD (Fast Wide controller) and some older-looking HP
> SureStore 2000S (C2940) Ultra Wide drives. I've tried multiple cables and
> multiple terminators, both active and passive.
>
> Basically, tho, none of the drives work. The diagnostics for the DAC960PD
> indicate a "cable error" that has to do with parity. This only occurs
> with a device plugged in. No combinations of just cables and terminators
> will cause this to happen.
>
> Unfortunately, I don't have any known-good 68-pin SCSI-II drives to test
> with. Does anyone have any ideas where would be a good place to go next?
>
> Matt Dharm
>
Matt,
Let see:
1. I'll assume that you don't have a SCSI analyzer.
2. You don't have a known good SCSI drive.
Basically, you are in thrash mode until you can get something to
work. Since you don't have a good drive to compare against, the
other approach is try directly attaching one of your drives to
a SCSI port...either motherboard with SCSI or a SCSI controller.
Maybe the SCSI bios will tell you a little more about what is
going on.
The rule of thumb is: One bad SCSI thing is hard to debug. Two
bad SCSI things are impossible to debug...
--
Dan Jones, Storage Engineer VA Linux Systems
V:(408)542-5737 F:(408)745-9130 1382 Bordeaux Drive
djones@valinux.com Sunnyvale, CA 94089
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