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Date:      Fri, 7 Mar 2003 10:43:53 +0100
From:      Francesco Casadei <fcasadei@inwind.it>
To:        Andre Albsmeier <andre.albsmeier@siemens.com>
Cc:        freebsd-stable@FreeBSD.ORG
Subject:   Re: (da0:ahc0:0:0:0): Unexpected busfree in Data-in phase and other weirdness
Message-ID:  <20030307094353.GA860@goku.kasby>
In-Reply-To: <20030307081541.B71305@curry.mchp.siemens.de>
References:  <20030228235031.GE5033@grummit.biaix.org> <20030301094934.GA547@goku.kasby> <20030306153355.A12907@curry.mchp.siemens.de> <20030306225837.GA1277@goku.kasby> <20030307081541.B71305@curry.mchp.siemens.de>

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On Fri, Mar 07, 2003 at 08:15:41AM +0100, Andre Albsmeier wrote:
[snip]
> I am no expert in these things, but: I have never seen a bad Adaptec
> controller (and I used lots of them from 2940 to 39160). I _have_ seen
> many bad cables/terminators. I _have_ seen many bad cables/terminators
> that used to work without a glitch and suddenly started to become bad.
> The possibility that this happens is reciprocally proportional to the
> price you pay for them :-)
>=20
> I have SCSI systems that worked for years and started to spit out bus
> error messages when changes were commmitted to the driver. In most
> cases it turned out that these changes only triggered bad cable/
> terminator errors or even firmware problems with the drive.
>=20
> Don't you have a friend who can give you a spare AHA2940 for
> testing?
>=20
> 	-Andre
>=20
[snip]
> end of the original message

Yeah, it's hard to think about an Adaptec 2940 failing, but I'm just
guessing the cause of the error.

I had ATA 'fallback to PIO mode' errors with three IBM 40G, and
I found that one of the three hd fans installed had failed. I removed it and
the the problem disappeared (system uptime is 31 days now).
Could it be an electrical problem due to a failing hd fan attached to the D=
NES
power cable?

Thanks for your help.

	Francesco Casadei
--=20
You can download my public key from http://digilander.libero.it/fcasadei/
or retrieve it from a keyserver (pgpkeys.mit.edu, wwwkeys.pgp.net, ...)

Key fingerprint is: 1671 9A23 ACB4 520A E7EE  00B0 7EC3 375F 164E B17B


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