XP won't install on Gigabyte K8NS Ultra-939

[carage]

For some unknown reason Windows XP refuses to reinstall on my system, when I plan to install it, XP always reports the harddrive partition is incompatible with Windows, which I find that to be total BS, because the same system was still running Windows XP a day ago.
I even reformatted the harddrive but nothing changed.

The manual mentioned stuff about loading drivers for RAID/SATA, but I ONLY use IDE drives.
Does anyone have any ideas? Thanks.
I tried three different versions of Windows XP, so I guess the problem isn't the XP CD.

 

[mechBgon]

Within Windows Setup, can you have it delete the existing "incompatible" partition(s) and then create new partitions and proceed?

 

[carage]

I did that too.
I deleted the incompatible partition, then created a new one and Windows still displays the same incompatible partition message.
I then proceeded to reformat the harddrive and ran fixboot and fixmbr then rebooted and XP still won't install.

 

[mechBgon]

Ok, how about list your full specs of all the parts in the system so people have the big picture, and if you have another hard drive laying around, try installing Windows on it as a fact-finding step, just to see if it works where the other drive didn't.

 

[DAPUNISHER]

My bad!

 

[carage]

Athlon 64 3500+
K8NS Ultra -939 BIOS F4
OCZ DDR400 1GB x2
Maxtor 80G x 2 (Connected to IDE1)
Sony DRU-710A (Master on IDE2)
Sony DDU-1612 (Slave on IDE2)
WD800JB (on IDE1 of Promise UltraATA 133 controller PCI card)
Seagate Barracuda 120G (on IDE2 of Promise controller)
BFG 6800GT
Soundblaster Audigy2 ZS
Promise UltraATA 133 controller card
Antec TrueControl 550W

Thanks for all advices. I removed my Promise ATA controller and the situation is still the same. I called Gigabyte this morning, one technician suggested it was a RAM issue, the other said I need to load nVidia ATA drivers first. Both solutions failed.
I will take my system back to the store tomorrow and see what they can do.
At this point, I am starting to suspect a faulty ATA controller instead of drive failure because the chances of two harddrives crashing the same time is fairly remote. If that is indeed the case, I might come back with a 36G Raptor and another 200GB SATA tomorrow. (Maybe a FX-55 too... If I can get one.) If it is a problem with the board, I hope the store can give me a replacement board.
Thanks for any help.
I tried installing on the other Maxtor too, but still reported the same problem.
I am not willing to try installing on the two drives connecting to the Promise controller because they are almost full and I don't want to reformat either of them.

 

[carage]

Just took my rig back to the store today.
I can't believe it will take them 2 to 3 days to figure out what's wrong and it costs $89 just for diagnostics.