Data Recovery.

[AzazaelFenrir]

I am just going to jump right in.

I was attempting to clone a drive and accidentally selected the wrong target. I stopped it like 5% into the clone when I realized what happened.

Is there a way to get the data back from the incorrect source drive?

I have tried a few programs (sorry don't have the names in front of me) and they only see the data from the drive I was cloning, they see none of the data that was previously on the drive.

[Norellicus]

If you're cloning a drive, it usually goes sector by sector, starting with 0, which means your allocation tables are gone :X

Your only option would be one of those services that can pull data directly from the surface area; most applications you can run depend on the file allocation tables to still be mostly intact if you want to be able to recover something.

[Isiolia]

Some apps may be able to still go in and look, but recovering the entire filesystem may prove to be very difficult...

http://www.e-fense.com/helix/ is a Linux based bootable forensics kit that you can download. It's been a bit since I've used it though, so I couldn't walk you through it...but it does have at least some of the capabilities you'd need.

[Shuemue]

R-Studio might help, it's unlikely to recover the FAT but it's pretty slick for recovering files.

[Sigi]

Zero-attempt Recovery would also be a good shot-
There are also some commands in Linux that allow you to pull up the secondary copy of the fat and restore it- I just forget them offhand