I temporarily lost power to my computer while syncing my iPod Classic 80g. It turned back on immediately and booted back up. Ever since then, my iPod has been unrecognized by iTunes. I've tried LITERALLY everything I can think of. I uninstalled and re-installed iTunes. Reformatted my iPod in disk mode (to NTFS... I read on a related thread that I should use FAT32, but that isn't even listed as an option...). I even took my iPod to my work computer and did a system restore on it from there. It worked almost immediately, which made me think that maybe the problem is just in my computer, or my personal version of iTunes.
Every once in a while, iTunes does recognize it, and it opens (EXTREMELY slowly...), then proceeds to tell me that my iPod is corrupt and needs to be restored. So I click restore and update, and then I left it on literally FOR 12 STRAIGHT HOURS, and it didn't make any progress. The system restore I did at my work computer took all of 10 minutes, maybe. So obviously something's fishy here. It seems that the moments when my iTunes actually recognized the iPod were all completely random anyway, nothing that I did seemed to make a difference in the frequency of that happening, but the results were all the same.. The computer basically locks up and won't do anything while it tries to "restore", but fails miserably.. I keep all my music on a separate external hard-drive anyway, so I'm thinking I can just take that to my work computer and upload the music to iTunes and just upload my iPod from there, since it seemed to work. But that doesn't really help me in the long run, it's just a temporary fix to get music on the iPod, and there's still no guarantee for it to work... =\
I bought the iPod second hand from a good buddy of mine. He had it about 3 days and just decided he wouldn't use it enough to warrant owning it, plus he owed money on some bills so I got it fairly cheap, around $100. He hadn't even hooked it up to his computer yet, so it was basically brand new. However, since I bought it second hand like that, I'm afraid that if I take this to an apple store, then they won't be able to do anything about it. It's been almost a year since he bought it.