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Date:      Fri, 7 Sep 2001 18:25:41 -0400
From:      "Drew Derbyshire" <avatar+Sept2001@kew.com>
To:        "Randall Hopper" <aa8vb@nc.rr.com>, "Dave Uhring" <duhring@charter.net>
Cc:        <stable@freebsd.org>
Subject:   Re: UDMA ICRC error reading fsb (?)
Message-ID:  <002401c137ec$071f0ed0$94cba8c0@xena>
References:  <20010906204356.A4116@nc.rr.com> <auto-000028388966@dc-mx05.cluster1.charter.net> <20010907180403.A1472@nc.rr.com>

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> Dave Uhring:
>  |On Thursday 06 September 2001 07:43 pm, Randall Hopper wrote:
>  |> ad0s2a: UDMA ICRC error writing fsbn 3283483 of 396704-396713 (ad0s2
bn
>  |> 3283483; cn 204 tn 98 sn 49) retrying

> Ok, thanks.  But what do these messages "mean" on a technical level?

CRC == checksum == the bits don't add up properly.    Most of the data is
WHERE on the disk it's trying to write.

> And could these just as well indicate a marginal cable, bad connector,
> loose connector, or the other hard drive on the controller being a bit
> flakey?

Yes (but I doubt it, especially the last).  I did have a loose SCSI
connector on my Windows 2000 box recently -- BAD news.  So reseat your
cable, etc... but also get the vendor diags from their web site and run them
on your drive ASAP.

-ahd-

--
Internet:       ahd+sig@kew.com             Voice:          781-279-9812

"Any sufficiently advanced technology is indistinguishable from a rigged
 demo."



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