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Date:      Sun, 5 Aug 2001 17:40:13 +0200
From:      Carl Drougge <freebsd-stable@z42.net>
To:        Erik Rothwell <erothwell@callgtn.com>
Cc:        stable@freebsd.org
Subject:   Re: ad2s1e: UDMA ICRC error reading fsbn...
Message-ID:  <20010805174013.A9023@bigtower.net>
In-Reply-To: <20010805031856.N4222-100000@endymion>; from erothwell@callgtn.com on Sun, Aug 05, 2001 at 03:24:25AM -0400
References:  <20010805031856.N4222-100000@endymion>

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On Sun, Aug 05, 2001 at 03:24:25AM -0400, Erik Rothwell wrote:

> I've recently added a new 40GB disk to my existing FreeBSD system... It's
> been less than flawless ;) When I first went to fdisk / disklabel the new
> drive, I got an error stating that the drive geometry was improper... I
> let /stand/sysinstall pick its own more suitable geometry and proceeded
> to newfs the drive, etc. etc. Everything seems all well and good-- the new
> drive mounted to /data... however, when I did a few tests moving data to
> the new drive I get a *lot* of the following:
> 
> ad2s1e: UDMA ICRC error reading fsbn 400447 of 200192-200447 (ad2s1
> bn 400447; cn 397 tn 4 sn 19) retrying
[snip]
> 
> and so on...
> 
> the file eventually transfers but its quite noisy... now, I'm wondering if
> this is due to kernel settings or my UDMA configuration-- or perhaps due
> to some hardware problem.

I would say the cable. Or using UDMA66/UDMA100 on a 40 pin cable.
(ICRC should be the CRC of the tranfer, if I guess correctly, which means
the disk transfered the data correctly, but it didn't reach the controller
correctly. Try forcing it to use a slower mode (not that I know how..).)

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