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Date:      Sat, 13 Mar 2010 08:38:48 -0800
From:      Jeremy Chadwick <freebsd@jdc.parodius.com>
To:        Torfinn Ingolfsen <torfinn.ingolfsen@broadpark.no>
Cc:        freebsd-stable@freebsd.org
Subject:   Re: panic - sleeping thread on FreeBSD 8.0-stable / amd64
Message-ID:  <20100313163848.GA94056@icarus.home.lan>
In-Reply-To: <20100313141113.cd215e62.torfinn.ingolfsen@broadpark.no>
References:  <20100131144217.ca08e965.torfinn.ingolfsen@broadpark.no> <20100306141944.95ec8cb6.torfinn.ingolfsen@broadpark.no> <20100307122913.2f634018.torfinn.ingolfsen@broadpark.no> <20100313141113.cd215e62.torfinn.ingolfsen@broadpark.no>

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On Sat, Mar 13, 2010 at 02:11:13PM +0100, Torfinn Ingolfsen wrote:
> Update:
> Perhaps the problems I have with this machine[1] are related to the
> MB-455SPF[1] hard drive cage I am using. It has three power connectors,
> which distributes power to all five drives. The documentation doesn't
> say more about which ports gives power to which drives, but since it is
> always drive 2 and 3 in the cage (ata5 and 6) that I've had problems
> with, I rearranged power connections to the cage. We will see
> if that makes any difference.
> 
> 
> References:
> 1) http://sites.google.com/site/tingox/ga-ma74gm-s2h
> 2) http://www.icydock.com/product/mb455spf.html

That enclosure also doesn't state if it has a SAF-TE or SES-2 chip on
it.  It's impossible to tell from the photos since the metallic
enclosure cover up the backplane.

If it does, such chips can/will yank devices off the bus when the chip
considers the drive "faulty".  At least in the SCSI world with SES-2,
I've seen QLogic GEM318 and GEM354 chips do this.  Here's an example of
what I'm referring to:

http://www.supermicro.com/manuals/chassis/mobile_rack/CSE-M34.pdf

-- 
| Jeremy Chadwick                                   jdc@parodius.com |
| Parodius Networking                       http://www.parodius.com/ |
| UNIX Systems Administrator                  Mountain View, CA, USA |
| Making life hard for others since 1977.              PGP: 4BD6C0CB |




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