500GB Western Digital USB External My Book Essential Hard Drive 10.5.4 iBook G4 My 500GB has two volumes on it. Recently the hard drive fell from desk and now only one of the volumes mounts. I've ran Disk Utility on it, and the volume shows up, but it won't verify it. It throw an error of "Invalid Index Key" And then when I try to repair it, it doesn't. I ran SpinRite on the drive, but no luck. Any ideas?