Hello, all. so here I was all nice and dandy minding my own business, working with my iBook G4 OS X Tiger when suddenly I started to get the Beachball. I restarted Tiger. Booted with no problems. Logged in and started working again, then, after a while, again, the Beachball. Nothing responded, so I had to restart the machine. The Apple chime. Then the Gray Apple with the "loading" wheel. Forever. Hardware Test says everything's OK. Tiger Install DVD's Disk Utility show the disk's SMART status as "verified", and it shows the number of folders, the correct capacity and space information. But when I try to repair the disk, I get the error: "cannot unmount". Somehow, the machine won't boot neither in Safe Mode nor Single-User. All I get is the Gray Apple screen. I have removed the AirPort card and the extra RAM. No change. I know my files are there, because I see them with the Install DVDs Terminal application; I can even cat the text files. And the machine will respond to ping requests from other machines. My main priority right now is getting my files out of the iBook. Then, if nothing else works, I'd just reinstall Tiger (maybe after trying Archive option first). Any ideas? Any help will be much appreciated.