Originally posted by: mmntech
The iBook uses standard 2.5'' mobile ATA-6 PATA hard drives. Just be warned though that replacing the hard drive on the white iBooks is a real PITA. It requires you to practically take the whole thing apart, which is easier said than done.
He's not kidding. You need to remove the keyboard, remove the topcase (palmrest/trackpad) assembly, remove the battery, remove the bottom case, remove the lower EMI shield, remove the upper EMI shield. Basically what you will have left is the display, logic board and endoskeleton. It is pretty insane.
For the record, the 12" PowerBook is only slightly easier to replace the hard drive.
You also definitely want to go to ifixit.com and use the guide that they have there. Their guides are almost universally excellent.