I do not have any experience with disk repair software beyond Apple's own Disk Utility, but I recently read an article from the TidBITS newsletter covering this exact topic: http://db.tidbits.com/getbits.acgi?tbart=07451 I hope this article will help you with your choice. - Mike W. P.S. The "re-something" you're talking about is probably re-formatting. If your iBook is pretty new and you don't have much personal data on the drive yet, it's really not that scary. On the other hand, if you've got a lot of files on the iBook that you don't want to lose, then it's a little scarier. If it comes to that, I'm sure someone on this list can help you out if you need it (myself included). Good luck! Erin Randel wrote: > I have a pretty new 14" ibook that went to a blue screen right before > our family vacation in November. (Yay!) When we came back, I got apple > care to try and fix it (I didn't know about booting from a disk). > > The second, less snotty applecare guy said i'd need a third party > program to address some of the ibook's problems: invalid volume file > count? Missing thread count? I'm a designer and a bit of a computer > retard. The guy told me to get norton, disk 10 (??) or disk warrior. > > What have you used, what's worked, how should I pick? > > Thanks, Erin > > PS: alternative is to re-something the hard drive. Sounds scary!!