Don't forget to check your Network Adapter as well. The older ones have trouble with newer Seagates and newer Maxtors. I didn't find this out until after I bought a 300GB Seagate drive. Lucky for me, my friend was willing to trade his 250GB Hitachi from his PC for the Seagate.
My older Network adapter has a date code of 2C, manufactured in Japan (maybe the new ones are made in China?), and a sticker on the bottom that says REN 0.1
PS2 V5 - 250GB Hitachi - Matrix Infinity - Blaze VGA Adapter
XBOX V1.0 - 200GB WD - DuoX VGA Bios - Homebrew VGA Cable
NGC V1.0 - XenoGC - Hacked Official Nintendo Component to VGA Cable