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Date:      Wed, 1 Nov 2000 13:57:10 -0500 (EST)
From:      Tim McMillen <timcm@umich.edu>
To:        Arcady Genkin <antipode@thpoon.com>
Cc:        freebsd-questions@FreeBSD.ORG
Subject:   Re: ad0: DMA problem fallback to PIO mode; HARD READ ERROR blk# 25418687
Message-ID:  <Pine.SOL.4.10.10011011352230.16836-100000@breakout.gpcc.itd.umich.edu>
In-Reply-To: <87d7gf35ff.fsf@tea.thpoon.com>

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Yeah that makes it a good likelihood that it is the controller.  Are there
two IDE controllers on your motherboard?  Try the other one.
Or see if you can borrow a pci card controller to test the drive with.  Or
just put the drive in somebody elses computer and boot with a boot floppy
to see if the drive works there.  Then let us know.  Luckily IDE
controllers are very cheap.  So you can add another and disable the
original.

						Tim

On 1 Nov 2000, Arcady Genkin wrote:

> I just replaced a hard drive in one computer, because the previous one
> died last night.  (It was a 3.5 years old WD, so I thought that it had
> to happen).  Well, I was getting these errors with the previous
> harddrive.  Now I completely reinstalled the system, and I'm getting
> same error messages with the new one.
> 
> ad0: HARD READ ERROR blk# 25418671
> ad0: DMA problem fallback to PIO mode
> ad0: HARD READ ERROR blk# 25418687 status=59 error=40
> ad0: DMA problem fallback to PIO mode
> ad0: HARD READ ERROR blk# 25418687 status=59 error=40
> ad0: HARD READ ERROR blk# 25418687 status=59 error=40
> 
> After these errors the box just rebooted.  This looks scary.  Could it
> be the controller?  The box is an older P166, running 4.1.1-S.
> 
> I don't quite believe in coinsidence of identical problems happening
> to successive hard drives.  The new one is a very nice 13G IBM
> DeskStar 7200rpm, 2Mb cache.
> 
> Any ideas?
> Many thanks,
> -- 
> Arcady Genkin
> Don't read everything you believe.
> 
> 
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