Partitioning problem

I have a Maxtor 750G Onetouch that I use with a mac and PC. The setup of the hard drive is four partitions with Fat32. I mostly use my MAC now so I decided that I would change one partition so that I could use the backup software that came with the Maxtor (instead of manually backing up each folder). I used disk Utility to change one partition to Mac OS extended, (which the backup software said was required). During the formatting I got a format error and now disk utility says:

Write Status : Read/Write
Connection Type : External
S.M.A.R.T. Status : Not Supported
Partition Map Scheme : Unformatted

Unfortunately there is about 200 Gig of info that I do not want to lose on the hard drive. Is there a way to repair the drive? (disk utility does not give me the repair option)
Should I try with a PC? (do not currently have a working one)
Is it possible to have two different formats on one hard drive? (a google search said that it was possible but now I have my doubts)

Thanks for any advice.