Re: Fwd: Drive crash

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Author: Matt Graham
Date:  
To: Main PLUG discussion list
Subject: Re: Fwd: Drive crash
From: Eric Shubert <>
> On 10/05/2011 12:17 PM, AZ Pete wrote:
>> Does anyone have recommendations for a data recovery business,
>> preferably here in the valley. My external drive isn't working.
>> Seagate wants $600 for data recovery
> Have Jim email me. I might be able to help him out, for a reasonable
> fee.


I've also done stuff like this a couple of times. Results obtainable with
*just* dd_rescue and fsck vary widely depending on how many bad sectors are on
the disk. The more actual bad sectors, the more likely you won't recover
much. The last disk I tried to recover, roughly 25% bad sectors meant a
filesystem that was basically beyond fsck's capability to fix.

Also, if the disk is marginal, trying to read from it may increase the number
of bad sectors if/when you decide to try doing more expensive hardware-based
recovery. The first thing I'd try is to plug the disk in to a Linux box
without any sort of automount utility running and try to read the first few
sectors with dd. Bad sectors there = bad prognosis. No errors = try mounting
the first partition, go from there. Errors = try dd_rescueing the partition
to a known good disk so you have a copy, then run fsck or other tools on a
copy of the copy. Simple to think about. More difficult to *DO* and get
useful junk back....

--
Matt G / Dances With Crows
The Crow202 Blog: http://crow202.org/wordpress/
There is no Darkness in Eternity/But only Light too dim for us to see


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