During a rescue mission I encountered read errors on both hard drives of a degraded RAID. Since most commercial end-user tools limit your flexibility I went for Ubuntu Rescue Remix 12.04 in order to use ddrescue. However, to my delight I found that a utility was added to accompany ddrescue. The name of that utility?: ddrutility.
This is a little script taking as its input the log file from a run of ddrescue and giving you the name(s) of the file(s) affected by disk errors.
So with this I found out that on the disk in question the error was in the file msoe.dll, belonging to Windows Mail and thus not in use there. Brilliant. I could live with that loss without a problem.
// Oliver