Joi Ito's iTunes Mess

Joi Ito has been having grief with his iTunes purchases. More good publicity for drm.

"I had set Mizuka up with iTunes music store on a Mac Mini with an external drive. At some point, she had filled up most of the external drive with stuff and she alleges that iTunes told her it was going to start moving stuff to another drive. Then certain songs stopped playing. I sort of ignored her mumbling until I asked her to run disk doctor on the drive. The utility told us that her disk was irreparably broken. The songs are broken on her iPod too. (The bad songs skip.) Apple says back up, or when you disk dies you out of luck.

Is there nothing we can do? I'm about to copy all of the music onto a new drive, erase any files that don't play and call it a day. Does anyone have any advice or a better idea?

UPDATE: Kevin Marks recommended Disk Warrior, which seems to have fixed the drive, but now many of the files are 0 bytes long. I guess we just lost a lot of music. Hmm..."