Missing SATA ports?

[denbigh1974]

I have a p.c. with a Supermicro X7DWA-N motherboard (tinyurl.com/3dv3g5), which has 6 SATA ports. I have four SATA II HDDs and a SATA DVD Writer. There are no IDE hard drives, floppy drives or CD drives connected.

My operating system is 32-bit XP Pro SP2.

The problem I have is that only the first four SATA ports are recognised by the Phoenix BIOS. I am assuming that ports 5 and 6 are hidden, because they do not appear in the BIOS screen and any SATA device plugged into ports 5 and 6 are not detected by the BIOS or Windows XP.

Please can anyone tell me how to enable SATA ports 5 and 6?

In the BIOS set up, I have the following settings:
Parallel ATA - Disabled
Serial ATA - Enabled
Native Mode Operation - Serial ATA
SATA Controller Mode Option - Enhanced
Serial ATA RAID - Disabled
SATA AHCI - Disabled

Are these correct for a non-RAID system?

[denbigh1974]

The problem was that AHCI was disabled.

You have to load the drivers from a floppy before loading the operating system.