Date: Wed, 22 Dec 2004 13:36:18 +0100 From: Matthias Andree <ma@dt.e-technik.uni-dortmund.de> To: Oliver Brandmueller <ob@e-Gitt.NET> Cc: current@freebsd.org Subject: Re: twa driver, 3ware 9500s-4lp, speed issue Message-ID: <m3d5x2a4sd.fsf@merlin.emma.line.org> In-Reply-To: <20041222114309.GB39637@e-Gitt.NET> (Oliver Brandmueller's message of "Wed, 22 Dec 2004 12:43:09 %2B0100") References: <41C78F9B.4010804@michaelmeltzer.com> <20041222114309.GB39637@e-Gitt.NET>
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Oliver Brandmueller <ob@e-Gitt.NET> writes:
> We had reproducably very bad experiences with 8500 and 9500 3ware disk
> controllers in combination with Raptors. After a while (this can be
> hours or weeks) one of the disks was detached from the RAID ("drive
> timeout"). You could remove it with tw_cli, when trying to rescan it was
> not found, until the disk was physically removed or the machine was
> switched off (only rebooting was not enough): This means the "failed"
> disk needed to be powercycled.
I'd probably replace the drives by a different make or at least model;
the earlier 36 GB Raptors at any rate - check storagereview.com why.
Checking/improving drive cooling may be worthwhile though.
> We switched to the slightly more expensive ICP Vortex controllers in our
> new machines and will be replacing the old 3wares in the older
> machines.
Does replacing the adaptor help when the drives lock up?
I doubt that.
My ancient Micropolis 4345WS drive in a test computer w/ FreeBSD 4.X
locks up randomly regardless of the SCSI adaptor (no RAID), I've tried
three different chips, Tekram DC-390 (AMD 53C974), DC-390U (SYM53C875),
Adaptec 2940UW Pro (AIC 7880) - the problem remains. Must be the drive
then in my case.
--
Matthias Andree
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