Ok, the BIOS bug is a bit of a red herring - xm dmesg shows xen getting the e820 info correctly. I just needed to learn how to build kernel modules so I could update to the latest kernel and build my ide driver. Appears to work now. Jamie PS Yeah, its 3.1.0. -- View this message in context: http://www.nabble.com/Centos5.1-x64-kernel-works%2C-x64xen-doesnt.-Fails-with-repeated-%22drive-appears-confused%22.-tp17551487p17572247.html Sent from the Xen - User mailing list archive at Nabble.com. _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users