1. What filesystem? EXT, Fat, Fat32, NTFS, ResierFS, MacFS....
2. Have you run a disk doctor/scan disk utility on it?
3. How about a partition repair utility (In fact, I might suggest this before #2).
What were the symptoms of death?
All of this info, what size the drive is, make/model/etc would be helpful in figuring out what the best approach to helping you is...