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Date:      Tue, 2 May 2000 08:41:08 -0500 (CDT)
From:      Chris Dillon <cdillon@wolves.k12.mo.us>
To:        Matt Rohrer <rohrer@hawaii.edu>
Cc:        freebsd-questions@FreeBSD.ORG
Subject:   Re: UDMA ICRC WRITE ERROR
Message-ID:  <Pine.BSF.4.20.0005020822220.88300-100000@mail.wolves.k12.mo.us>
In-Reply-To: <Pine.GSO.4.21.0005011838150.24476-100000@uhunix2>

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On Mon, 1 May 2000, Matt Rohrer wrote:

> Hello all,
> 
> I just upgraded my home workstation to 4.0-STABLE (sources 'suped
> 30 April). The new ad driver seems to not like my HD or
> configuration; whenever the HD is being accessed heavily, I get the
> following error:
> 
> ad0: UDMA ICRC WRITE ERROR blk# (someblock#) retrying
> 
> I get this error on 4.0-RELEASE and -STABLE, with or without the
> ATA_ENABLE_ATAPI_DMA option in the kernel. From the archives, it seems
> that others have had similar problems, but I found no answers.
> 
> Hardware:
> FIC SD11 mobo
> Athlon 500
> Maxtor 7200rpm 13.6gig UDMA 66 HD
> 128M RAM
> 
> Any ideas on how to make this error disappear? I suppose I could go
> back to the wd driver, but I'd rather have the DMA performance. Let me
> know if you need further info. Thanks.

I've seen the same problem on occasion.  So far, it seems to be
harmless.  I have:

Aopen AX6BC (i440BX chipset)
PII-450
128MB PC100
Maxtor 90650U2
Western Digital AC24300L

I don't think I have seen the problem on the Maxtor drive (ad0) yet,
but I have on the WD (ad1, which contains NT4 and is used by VMWare).

ad0: 6149MB <Maxtor 90650U2> [12495/16/63] at ata0-master using UDMA33
ad1: 4112MB <WDC AC24300L> [8912/15/63] at ata0-slave using UDMA33
ad1: UDMA ICRC WRITE ERROR blk# 1272570 retrying
ad1: UDMA ICRC WRITE ERROR blk# 1272378 retrying
ad1: UDMA ICRC WRITE ERROR blk# 1287866 retrying

The above errors didn't all happen at once, they were rather spread
out.

I have not yet scrubbed the WD drive with the factory utils to check
for media surface errors, but that could possibly be the problem.


-- Chris Dillon - cdillon@wolves.k12.mo.us - cdillon@inter-linc.net
   FreeBSD: The fastest and most stable server OS on the planet.
   For Intel x86 and Alpha architectures. ( http://www.freebsd.org )




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