LaCie external drive - one partition suddenly won't mount

I recently moved my itunes library over to my external 160gb harddrive - I put the itunes library on one of two partitions. After my computer froze up and I had to force it to restart, only the second partition shows up. In disk utility, the first partition is greyed. It will not mount, and when I attempted to repair it, I got a message saying "the underlying task reported failure on exit."
After reading post after post I'm starting to think I'm looking at a new harddrive. The data on the second (working) partition is very valuable to me, so I want to do something that will overhaul the whole drive. The missing partition contains music which is safely on my ipod, so I'm less concerned about that.
Any suggestions on how to either access the greyed partition or in setting up a new system would be greatly appreciated.
Thanks!

Hi,
Welcome to the Discussions.
When a drive isn't unmounted prior to disconnecting or shutting down (as a forced shutdown will do) the drive's directory can become corrupted. The error message Disk Utility gave you indicates the directory on that partition is damaged. Disk Warrior can repair most types of directory damage with no data lost.
John

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