eSATA HDD problems

[cricha]

Trying to get my GA-MA78GM-S2H motherboard to see a new eSATA HDD.  Operating system is Windows 7 RC 64 bit
The actual drive works using the USB connection
I have enabled ACHI
The drive is not showing up among the drives as the computer boots.
I can't see anything that I need to activate in the BIOS - but have I missed something?

Looking on Google others seem tohave similar problems but none of the solutions fit.

[Pottypete]

Hi
My esata drive don't show in bios either,
But it does once o/s is running, but I have not enabled ACHI
Regards

[mark rumsey]

If the eSATA drive is connecting via USB it won't show up in the BIOS. I'm not 100% sure, but I think with this setup it is treated as a removable drive and so won't be seen until the relevant drivers are loaded by the operating system. As far as I know the only way to make eSATA drives visible in the BIOS is to connect them using an eSATA backplate connected to a spare SATA port on the motherboard, and that would normally only be necessary if you need the drive to be visible from boot, i.e. if you are using it to hold the operating system.