I have a brand new PC, just out of the box. It has a Gigabyte GA-P55-USB3 motherboard.
I also have an Adaptec ASR-2504 SAS RAID card with 2x 15k Seagate Barracuda SAS drives attached.
After the motherboard init's its on-board RAID it then init's the Adaptec RAID. It detects all the RAID devices OK, but when it gets to
Loading Operating System... (i.e. right before it should load the OS) it just sits there forever, doing nothing:
If I force it to boot from the optical drive, you see it spin up for a few seconds then die down again.
If I remove the Adaptec RAID card, everything works perfectly. As soon as it's plugged back in, it never gets past that stage. The RAID card should be perfectly fine (it was before), but I have raised a case with Adaptec anyway.
Any suggestions on what I can try to get these two to play nicely together?