[8742] in linux-scsi channel archive
Re: Adaptec 2940U2W Still Hangs w/New Cable
daemon@ATHENA.MIT.EDU (Steven N. Hirsch)
Tue May 2 07:18:30 2000
Date: Tue, 2 May 2000 07:30:13 -0400 (EDT)
From: "Steven N. Hirsch" <shirsch@adelphia.net>
To: Jeff Hill <jhill@hronline.com>
Cc: linux-scsi@vger.rutgers.edu
In-Reply-To: <390E0EDC.B678B3D9@hronline.com>
Message-ID: <Pine.LNX.4.10.10005020726120.4392-100000@pii.fast.net>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
On Mon, 1 May 2000, Jeff Hill wrote:
> Based on advise from the list, I ordered a custom built cable from CS
> Electronics asking for the best quality they had: 3' LVD teflon with
> active negation terminator. A $125US later, system still hangs. Bummer.
>
> I have now spent five weeks off-and-on trying to find out why the system
> with a new Adaptec 2940U2W and 2xSegate LVD drives hangs momentarily
> (using 2.2.14 kernel with raid-2.2.14-B1 patch). The closest thing I
> have to a cause is that it seems to happen only when there is a load
> (medium to heavy) on the server and it happens less when I reduce the
> speed in the SCSI controller from 80Mb to 40Mb.
Just a WAG, but I fought a similar-sounding problem here on my ASUS P2B-DS
system board. After much head-banging, it turned out that I was setting
the CPU mtrr registers such that they were write-gathering over the
memory-mapped IO region of the SCSI controller! For some reason, the
address range used by my AGP video board had changed underneath me and I
hadn't noticed.
The symptoms were exactly what you describe in your posting. Check
/proc/pci and your init scripts carefully.
Steve
-
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majordomo@vger.rutgers.edu
