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To: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
References: <20080307094808.B6101@wojtek.tensor.gdynia.pl>
From: Lowell Gilbert <freebsd-questions-local@be-well.ilk.org>
Date: Fri, 07 Mar 2008 09:16:17 -0500
In-Reply-To: <20080307094808.B6101@wojtek.tensor.gdynia.pl> (Wojciech Puchar's
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Cc: freebsd-questions@freebsd.org
Subject: Re: OT: disk drive question
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Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl> writes:

> sorry for posting here but possibly someone here will know the answer.
>
> i have 120GB seagate in my thinkpad. yesterday i (possibly) overheated
> the disk somehow, by putting laptop on flat sticky surface.
>
> bad blocks developed on one partition like this
> ad0: FAILURE - READ_DMA status=51<READY,DSC,ERROR>
> error=40<UNCORRECTABLE> LBA=52944196
> ad0: FAILURE - READ_DMA status=51<READY,DSC,ERROR>
> error=40<UNCORRECTABLE> LBA=52955844
> ad0: FAILURE - READ_DMA status=51<READY,DSC,ERROR>
> error=10<NID_NOT_FOUND> LBA=52956740
>
>
> i was able then (with normal cooling) to back up data from there, and tried
>
> dd if=/dev/zero of=/dev/partition bs=1m
>
> to force bad block reallocation.
>
> but it doesn't work, then reading always shows read errors.
>
> how to force this, or possibly is there any disk utility that would do this.
>
> if it requires disk to be cleaned out (reformatted somehow) that's not
> a problem

If you can, try the manufacturer's diagnostics
http://www.seagate.com/www/en-us/support/downloads/seatools/

If not, try plugging the disk in on a working system and use SMART
capabilities to check things out.

Most likely, you need a new disk, but depending on the relative value
of your time and the price of a disk, it's worth checking to make sure
before springing for new gear.

Good luck.