Just uploaded some new MP3s to my player. All seemed to go during the upload process, but when it got to rebuilding the database, one of the hard disks (don't know which) seemed to be having difficulty, making a rhythmic scanning noise. The rebuilding seemed to take a long time to complete too.

Now it's finished, I get errors on almost all the tracks I just uploaded, of '[trackname] could not be synchronized., error 0xc004101e', and also, about 15 other playlists which have been unaltered for quite some time have errors reported in Emplode, of 'The length of [playlistname] did not match the actual number of children detected'.

Does this sound ominous? Any ideas on my best plan of action? How do I even tell which hard disk might be failing?