I've been struggling with a bunch of Windows XP Event 7 errors: "The device, \Device\Harddisk1\D, has a bad block". I assumed at first that the "D" referred to logical drive D, which sent me down a dark alley trying to fix the wrong hard disk. I eventually figured out that my logical disk "D" was on harddisk0, and was working perfectly well. The faulty "harddisk1" contained only logical drive "F". So the "D" definitely does not refer to the logical drive with the problem. Anyone know what it does signify?