I have my iTunes library on an external drive and everything was working well until this morning when iTunes was slow loading and would not play Aiff files. It kept coming up with the message of not being able read or right to them. I checked the file info for some of the songs and looks ok to me. I restarted my computer, ran disk utility hd repair, ran onyx for everything, but nothing. Any suggestions.
iMac, Mac OS X (10.6.7), 20" mid 2007 6 gigs ram, 320 g hd