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Date:      Thu, 13 Mar 2003 11:23:29 -0600
From:      Mike Meyer <mwm-dated-1048008210.841417@mired.org>
To:        Dragoncrest <dragoncrest@voyager.net>
Cc:        freebsd-questions@FreeBSD.ORG
Subject:   Re: Possible drive failing??
Message-ID:  <15984.48785.641871.635988@guru.mired.org>
In-Reply-To: <4.2.0.58.20030313091740.009de820@pop.voyager.net>
References:  <4.2.0.58.20030313091740.009de820@pop.voyager.net>

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In <4.2.0.58.20030313091740.009de820@pop.voyager.net>, Dragoncrest <dragoncrest@voyager.net> typed:
> 	Hi all.  I got this message in my daily reports and I've got a 
> question.  Does this signal possible disk troubles or potential 
> failure?  Here's the message.
>  > ad0s1g: hard error writing fsbn 13434039 of 5930556-5930559 (ad0s1 bn 
> 13434039; cn 836 tn 58 sn 45) trying PIO mode
>  > ad0: DMA problem fallback to PIO mode
> 	Is that something I can ignore, or should I keep an eye on this??

Well, there is some possibility that it's just a one-time hiccup. More
likely, the drive has already exhuasted it's supply of replacement
blocks, as modener drives do bad block remapping all by themselves. In
the latter case, the drive is about to fail catastrophically. At the
very least, I'd keep a very close eye on the drive, and double-check
my backups if I saw that happen to one of my drives. Depending on how
critical that system is, I may have a backup ready, or replace the
drive under controlled conditions before things get worse.

	<mike
-- 
Mike Meyer <mwm@mired.org>		http://www.mired.org/consulting.html
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.

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