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knoker

Member

Registered: 2014-11-15

Posts: 2

dd to the wrong disk

Hello,
first of all thank you for any help you might give me...
So this is the situation.
I was DDing a 1.2Gig image to a pen, but I ended up selecting a 1TB disk containing about 800Gb of media and some work.
Is it possible to recover the data that was not in the 1.2Gig blast zone? If so how?

[EDIT]
The disk was EXT4
the command was a dd bs=4M

Thanks in advance...

Best Regards,
KnoKer

Last edited by jasonwryan (2014-11-15 18:03:08)

karol

Archivist

Registered: 2009-05-06

Posts: 25,440

Re: dd to the wrong disk

See e.g. https://wiki.archlinux.org/index.php/File_recovery

jasonwryan

Anarchist

From: .nz

Registered: 2009-05-09

Posts: 30,424

Website

Re: dd to the wrong disk

Please read the Forum Etiquette, notably How to Post: https://wiki.archlinux.org/index.php/Fo … ow_to_Post

Not a GNU/Linux discussion, moving to NC...

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graysky

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From: :wq

Registered: 2008-12-01

Posts: 10,612

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Re: dd to the wrong disk

Not too much you can do... dd = destroy disk as they say.  Always triple check the of target.  Hope you have a good backup.

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davidm

Member

Registered: 2009-04-25

Posts: 371

Re: dd to the wrong disk

I would particularly check out testdisk and photorec from the link Karol gave you.  Testdisk would be easiest but almost surely would you be able to get the data not overwritten with photorec.  It's just not a fun process.  So that is the good news - you ought to be able to get anything which is very important still as long as it wasn't in the 1.2G area which was overwritten.

Last edited by davidm (2014-11-15 19:33:21)

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ids1024

Member

From: California

Registered: 2013-08-16

Posts: 243

Website

Re: dd to the wrong disk

The aforementioned testdisk should help to recover what has not been erased.

To prevent this kind of thing from happening, you probably should make regular backups, if you don't already. Rsync should help with that.

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knoker

Member

Registered: 2014-11-15

Posts: 2

Re: dd to the wrong disk

Hello,
Thank you all for the advise, but Yesterday wen I got home the disk was already formatted and with 342Gigs in use.
So besides being pissed there is nothing worth doing now...
Tho I'll take in consideration your advice in future fuckups, and try to be more careful.