data recovery from a fedora 5 system

[Brian Olesen]

Hi tim,
thank you very much. this was a very informative posting!

Brian
----- Original Message ----- 
From: "Tim Chase" <blinux.list at thechases.com>
To: "Linux for blind general discussion" <blinux-list at redhat.com>
Sent: Tuesday, April 28, 2009 6:40 PM
Subject: Re: data recovery from a fedora 5 system


>> for several years i've been running a fedora core 5 system that seriously 
>> crashed the other day.
>> it was caused by a faulty power supply.
>>
>> This part is fixed now, but now I don't know to recover data from the 
>> harddrive.
>
> If the power-supply was the only thing that died, replacing it should be 
> sufficient and the rest of the system should just come back up.  You might 
> have to run a fsck on the drive when it boots, but it should be fine. 
> I've had this happen to me uneventfully.
>
> If for some reason the hard-drive crashed, you have deeper problems.  The 
> first thing to do would be to put it in another machine and image it using 
> the "dd" command.  Assuming this defunct hard-drive is /dev/sdb you can 
> use
>
>   dd if=/dev/sdb of=image.dsk
>
> Alternatively, you can copy the drive image remotely from another machine 
> by booting a CD/flash drive on your old machine and then from your 
> new/good machine use:
>
>   scp brian at oldmachine:/dev/sdb image.dsk
>
> If you *can* image the disk, you've got a chance of rescuing your files. 
> However, if you can't even get a disk image, you may be out of luck and 
> have to use a recent backup or send the drive to a drive-salvage company 
> to get them to extract the content for a large price-tag.
>
> With that drive image, you can then try to mount that file on a loopback 
> device as read-only to salvage your files.  If that fails, you might try 
> to use tools like "ddrescue" or "foremost". Kyle Rankin authored a good 
> Linux Journal article on using ddrescue.
>
>   http://www.linuxjournal.com/article/10360
>
> If that doesn't work you can try
>
>   foremost -t all -i image.dsk
>
> to pull all the files that foremost knows how to find (it only recognizes 
> certain file-types).  Both are available in my standard Debian & Ubuntu 
> repositories.
>
> Hope this helps,
>
> -tim
>
>
>
>
>
>
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