Mobo - ASUS P4B266-C (i845 chipset)
IAA 2.2's on WinXP Pro. (NTFS)
I split a 20gig Maxtor ATA100 11/9.
I just upgraded from Win98SE to XP (fresh load though, I tried the upgrade but it seemed a little doggish so I broke down and did the 8 hour reload (but made a fresh ghost of it so 15 minutes next time)).
Its funny those 620's worked in 98SE for me (used them because the IAA's wouldn't let speed disk 2001 work).
I am just using the defrag included with XP now though, but am looking for something better. Not sure Norton's is the way right now.