On Thu, Aug 27, 2009 at 10:24:18PM +0530, Gopalakrishnan Subramanian wrote: > Hi > I am using libvirt and virt-manager to manage and run 2 Fedora 10 > guest operating systems for the sake of installing a Oracle RAC > environment . As part of the process after using the both gues for some > work i felt the nedd to add an additional virtual scsi disk to one of the > hosts. > Trying to start the guest os after adding this scsi virtual disk to the > host fails (see image) . The guest BIOS screen and all comes up fine but > it now seems to be trying to boot from the newly added disk . Fiddling > around with the order of the disks as listed in the xml has not helped > either . > Yeah this is a bug in libvirt - its stupidly reordering disks itself. I've got a patch that will be in the next libvirt release http://www.redhat.com/archives/libvir-list/2009-August/msg00340.html There's no real workaround before that other than make sure you only use the same type of disk - eg always SCSI, or always VirtIO, but never a mix of both. Daniel