Need help on detecting disks

Hi.
I've built a couple of computers before, but this is my first with SATA.
I've assembled it togehter and booted it, but when WinXP Home is running its install-procedure it doesn't detect any HDD's..
I'd like the Raptor to be my Windows-only disk, and the Caviar to everything else. How do I get WinXP install to detect the drives? How do I configure the BIOS correct (BTW: I also get the message NO BIOS INSTALLED or simular on every boot)
Thanx in advance for any help.

The problem was (I think) that I had the drives connected to one set of SATA-plugs on the mainboard, and the oposite settings in BIOS. When going through the BIOS and set wiring on the mainboard one more time, I discoverd the error.
Booted again, and it worked.
The windows setting regarding loading drivers from the floppy was never the problem, but when windows had done that it still did'nt find the drives.
anyways ... problem solved - case closed.
Call me a newbie if you want, but it was very late here in Norway (01:30 am I think) and I was very tired - and did'nt see the problem right away. :-)
Glad that a forum like this was at hand.

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