OK, this works on many other systems...
A8N32 bios 1103, 4800+ (x2 core, maybe ok to post this here at good 'ol 2cpu?), 7800GTX, SB Audigy 2ZS
Set up 2 Hitachi 80G in raid1 on sata 1&2 ports, installed xp 32bit, no problem.
Unhooked above 2 drives, set up 2 Hitachi 80G in raid1 on sata 3&4 ports, installed xp 64bit, no problem.
Plugged in first 2 drives, told bios to boot from first raid set, blue screen and reboot.
Same thing choosing second raid set as boot device.
Unplug either raid1 set, other set boots perfectly.
Bought 2port SiI3132 PCIe x1 card, updated bios to raid, installed driver in each xp set with nothing plugged into new card (separately booting 32bit and 64bit without other plugged in), everything working fine.
Ghosted xp 64bit, wiped second raid1 set, created new raid1 set on new card, ghosted image back onto new raid1. 64bit xp boots flawlessly WITHOUT 32bit raid1 set plugged in.
If both sets plugged in to separate controllers, now getting text message:
Couldn't open drive multi(0)disk(0)rdisk(0)partition(1)
NTLDR: Couldn't open drive multi(0)disk(0)rdisk(0)partition(1)
without bluescreen.
I have done this type of thing many times with different systems, including an A8N-SLI with both raid1 sets on the 4 motherboard ports.
Starting to think it's in the A8N32 bios....
*pounds head on table*


