Comment 6 for bug 267199

You might check with your motherboard manufacturer to see if there is a way to disable their use of the HPA. Also the bios probably won't refer to it as HPA, but rather call it some sort of big disk access mode option. I have never used HDAT2 myself, but when configuring the disks HPA you can disable it temporarily ( the way the kernel does with ignore_hpa=1 ) or permanently. You might check to make sure you asked HDAT2 to make it permanent. Also the echo options trick should work on the livecd. Try break=premount instead of break=modules.