Ghosted the wrong harddrive

I hope this isn’t too off topic for this forum but I believe somone on this site can help and/or point me in the right direction.
I have a 80gb main hard drive partitioned in 2 to use 2 different OS, and a 30gb drive that I just accidently ghosted (restored) the image from one of the main drive partitions (a little over 2gb) to. Any suggestions how I may attempt to recover what I can from that 30gb drive?