I have an old ibook (600mhz g3, 384 mb ram, 20gb hd). Unfortunately I am getting the question mark during boot, and when it does boot it will sometimes freeze and make clicking sounds. I am guessing that this means it has a bad hard drive, so my plan is to replace the hard drive and reinstall OS X. First of all, will this hard drive work properly in the ibook? http://www.newegg.com/Product/Product.asp?Item=N82E16822152501 Secondly, I am planning on upgrading from 10.2.8 to Tiger when I install the new hard drive. According to the system requirements on the Apple site it should be compatible with Tiger, but does anyone have experience on how well Tiger runs on a computer of this vintage? I have looked over guides about replacing the hd. While it looks like an intricate process I think it is doable. My main concern is to get a hard drive that is compatible. Any insight would be greatly appreciated. Thanks!