On Thu, Oct 11, 2007 at 10:43:22AM -0700, Haifeng He wrote: > Hi, All > > I followed the steps in Fedora7VirtQuickStart to install Xen on Fedora 7. > I downloaded couples of file system image from http://jailtime.org/. However, > every time I tried to create guest OS using those file system image, I got error > messages: > > VFS: Cannot open root device "sda1" or unknown-block(0,0) > Please append a correct "root=" boot option > Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) > > An example of Xen configure is: > > kernel = "/boot/vmlinuz-2.6.20-2936.fc7xen" You don't have a initrd image that contains the block device and filesystem modules. I expect the images you have downloaded have a valid grub configuration inside it. If they have it, you can use: bootloader = "/usr/bin/pygrub" Instead of specifying a kernel that is outside the disk image. Pygrub will be able to read grub configuration and kernel/initrd images from inside the disk image. -- Eduardo -- Fedora-xen mailing list Fedora-xen@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-xen