I''ve been messing around with Xen in FC6 lately, and after some delays (figuring out SELinux was blocking access to my image, and finally moving it to /xen) I have been able to build OS images from scratch. Now, I am trying to get a few Xen images that I downloaded running. But, when I start the VM, I get a system/BIOS error message saying the disk is not bootable. Is there some extra step that needs to be done to get Xen to recognize disk images? I am running on a Core2 Duo based system, in 64 bit mode, with VT enabled. I''m using an HVM config, similar to one I used on a self built image. I''ve tried it with a few images, such as the MySQL VM from virtualappliances.net The config looks like: name = "mysql" builder = "hvm" memory = "128" disk = [ ''file:/xen/VirtualAppliancesMySQL/vadisk-xen-mysql,hda,w'', ] vif = [ ''type=ioemu, mac=00:16:3e:6c:c4:f2, bridge=xenbr0'', ] uuid = "ba39d3e4-130c-abf6-d7ae-a312420a4966" device_model = "/usr/lib64/xen/bin/qemu-dm" kernel = "/usr/lib/xen/boot/hvmloader" vnc=1 vncunused=1 apic=1 acpi=1 pae=1 vcpus=1 serial = "pty" # enable serial console on_reboot = ''restart'' on_crash = ''restart'' Any tips on how to get pre-made images working with FC6 Xen?