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Date:      Mon, 12 Nov 2001 14:47:29 +0100 (CET)
From:      Nils Holland <nils@tisys.org>
To:        Josh Paetzel <friar_josh@webwarrior.net>
Cc:        chia an <alan_qc@yahoo.com>, <questions@FreeBSD.ORG>
Subject:   Re: UDMA ICRC error
Message-ID:  <20011112144146.Y2393-100000@jodie.ncptiddische.net>
In-Reply-To: <20011112070019.E723@twincat.vladsempire.net>

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On Mon, 12 Nov 2001, Josh Paetzel wrote:

> On Sun, Nov 11, 2001 at 08:21:38PM -0800, chia an wrote:
> > hello friend_bsd;
> > 1 .i have a problem when booting my Freebsd 4.4, there
> > was an error appear like this :
> >
> > ad0s3a : UDMA ICRC error reading fsbn 1606628 of 64-79
> > (ad0s3 bn 1606628; cn 100 tn 2 sn 2 ) retrying
> > ad0s3a : UDMA ICRC error reading fsbn 1606628 of 64-79
> > (ad0s3 bn 1606628; cn 100 tn 2 sn 2 ) retrying
> > ad0s3a : UDMA ICRC error reading fsbn 1606628 of 64-79
> > (ad0s3 bn 1606628; cn 100 tn 2 sn 2 ) falling back to
> > PIO mode
> >
> > what should i do?
>
> This looks like you have a bad cable perhaps.  Does the disk seem to
> work ok after these errors come up?  It could also be an indication
> that your disk is dying.

I'd like to add a comment about this, as I just had it happen here the
other day as well. In short, I had two HDDs connected to the primary IDE
port. When heavy read access took place on the slave HDD, the above error
message tended to appear. It didn't seem to be connected to reading any
particular file, as the error seemed to appear totally random.

As a solution, I put one HDD on the secondary IDE port, and ever since
then the problem has gone away. I'm pretty sure that this must be some
issue with the (somewhat dated) mainboard I'm using. Generally, it should
be possible to put two HDDs on the same IDE port, but bad cables, flawed
mainboards and certain HDDs may cause trouble, although this probably
happens only very rarely.

I would recommend experimenting with the cabling as well as switching IDE
ports in order to track this problem down. If it doesn't want to go away,
the HDD should be tried in a different system, and if it still behaves
strange, it's probably indeed about to die. In that case, make a backup as
long as you still can and then try to get a new drive.

Greetings
Nils

Nils Holland
Ti Systems - FreeBSD in Tiddische, Germany
http://www.tisys.org * nils@tisys.org


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