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Date:      Fri, 30 Mar 2007 14:44:33 +0100
From:      Alex Zbyslaw <xfb52@dial.pipex.com>
To:        Christian Walther <cptsalek@gmail.com>
Cc:        FreeBSD Users Questions <freebsd-questions@freebsd.org>
Subject:   Re: ad0: TIMEOUT - Is my disk dying?
Message-ID:  <460D1441.60904@dial.pipex.com>
In-Reply-To: <14989d6e0703300200j670a46f3s6369d8132b76ba62@mail.gmail.com>
References:  <14989d6e0703291420y1ed229dej7e2808a859f6efa6@mail.gmail.com>	<B43905CF-7FE8-4A6F-8805-B15DE2C2EAB3@rottnic.nl>	<D6B5375CBC761B4BAD78E414B4BB55729101BC@mercury.rac.com.au> <14989d6e0703300200j670a46f3s6369d8132b76ba62@mail.gmail.com>

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Christian Walther wrote:

>>
>> > > I'm seeing a lot of the following messages lately:
>> > >
>> > > Mar 29 21:02:01 pixie kernel: ad0: TIMEOUT - READ_DMA retrying (1
>> > > retry left) LBA=13554983
>> > > Mar 29 21:02:34 pixie kernel: ad0: TIMEOUT - READ_DMA retrying (1
>> > > retry left) LBA=35376691
>>

Just thought I should point out that you can get errors like this if 
your disk drive *cable* is faulty or has wiggled loose.

I spent hours testing a 250Gb drive with manufacturer tools only to 
solve the problem by replacing the SATA cable.  I suspect the cable was 
fine and had just wiggled loose.  SATA may be thinner, but they're still 
a bugger to route because they pull out so easily.  Even an IDE cable 
could have gone faulty or wiggled out; but in 15 years that's never 
happened to me whereas I've seen 2 SATA cables wiggle out in an 
untouched tower case in two years.

--Alex





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