PC wont' boot when third SATA drive is hooked up

[limecat]

I bought a new 500g WD SATA drive, and SATA PCI card. I've installed the card fine. Currently I have two other SATA drives, including a Raptor that's my boot drive. Those two are plugged into a second SATA PCI card.

When I plug the new HD into the card and reboot, everything seems to go fine. During the boot screen, the SATA cards show they detect the HDs. Unfortunately not long after my PC gets to the "Boot from CD:" prompt, and then hangs. Usually it immediately goes to the Windows login screen, but not when I've got my third SATA drive plugged in.

I've tried swapping the drives around and plugging them into different cards and in different orders, but no love. It seems that whenever I have a third SATA drive plugged in, my PC wants to hang right before it boots. It seems that my PC can't figure out which SATA drive is the boot drive.

I unplugged the DVD and another HD from the power, just to be sure it wasn't a power supply issue. But the problem remained.

Anyone know how I could resolve this?

 

[LhasaCM]

If you already haven't, you should take a look at the BIOS and see if it is trying to boot off of the correct HD. (When you added the second card/third drive, depending on where the second card is in relation to the first one, it might be trying to boot from the wrong place.)