[Bug-ddrescue] DDrescue "undo"

[Giuseppe Cataldo]

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!