Re: [Bug-ddrescue] DDrescue "undo"

[andrew zajac]

Hello Guiseppe.

If you immediately stopped it, you may be able to salvage what's there.  You say the destination drive is now partitioned like a 49 GB drive?  Did you image sda to sdb or sda1 to sdb?  Perhaps you only overwrote the first few blocks in which case it may be possible to rebuild the partition table (first block) and repair the filesystem on the first partition by using a backup superblock/MRB (depending on the filesystem).

If you can't do that, you can always use file carving to recover most of the files you had.

See this for details on Tesdisk (to rebuild the partition table) and file carving:
http://help.ubuntu.com/community/DataRecovery

Good Luck.

Andrew Zajac


--- On Sat, 7/10/10, Giuseppe Cataldo <address@hidden> wrote:

From: Giuseppe Cataldo <address@hidden>
Subject: [Bug-ddrescue] DDrescue "undo"
To: address@hidden
Received: Saturday, July 10, 2010, 6:12 AM

Hi guys,

I'm an italian guy, my name is Giuseppe and I'm writing you to ask a question about DDrescue.

I really LOVE this GNU data recovery tool. I think that it's quite simple to use and it works really well (I'm writing this mail from a recovered hard disk ;-))

I use DDrescue quite often, and now I believe I can use it without many problems, but what I wanna ask you is about how to "undo" the DDrescue work. I'll explain better:

I tried to recover datas from an HDD with bad sectors, so I used DDrescue to "clone" this HDD on another HDD.

The first one with bad sectors had two partitions: 49Gb and 450Gb (sda). The bad sectors were on the first partition (sda1), so I use DDrescue to clone sda1 on another HDD, that was a 320Gb (sdb), with some datas on.

I did a mistake, typing sdb instead of sdc, and DDrescue started to transfer sda1 on sdb. I immediately used the CTRL+C function and...

now I have a 320Gb hard drive partitioned like a 49Gb, with the sda1 datas on, and I don't know how to recover the old files present on this hard drive.

I hope you can help me doing this...

Thanks in advance from Italy and...sorry for my bad english!

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