On Fri, Jun 10, 2016 at 08:19:11AM -0600, John Busch wrote: > Hello, > > I have a Linux 3.2 VM panicking when trying to boot (HVM) on Xen. > > I think this is related to the virtual storage controller that is presented > to the VM. > > The qcow2 image runs fine on KVM, but on Xen panics during boot with "VFS: > Cannot open root device "(null)" or unknown-block(0,0)". Can you run 'virt-manager' with --debug to see what kind of XML it constructs pls? Thanks. > > Both the KVM and Xen hosts are running stock Fedora 23, and virt-manager > was used to configure both VMs. > > To troubleshoot, I cycled the guest image through every permutation of disk > type (IDE, SCSI, SATA) using virt-manager on both KVM and Xen. Please see > below for a difference between Xen and KVM. > > --- > > On Xen, the guest's boot menu reports the following for each disk type: > > SATA disk: > lsi 00:02.0 1:0 Drive QEMU QEMU HARDDISK 2.5+ > Guest panics > > SCSI disk: > lsi 00:02.0 1:0 Drive QEMU QEMU HARDDISK 2.5+ > Guest panics > > IDE disk: > ata0-0: QEMU HARDDISK ATA-7 Hard-Disk > Guest panics > > --- > > On KVM, the guest's boot menu reports the following for each disk type: > > SATA disk: > ACHI/0: QEMU HARDDISK ATA-7 Hard-Disk > ***Guest works! > > SCSI disk: > lsi 00:02.0 1:0 Drive QEMU QEMU HARDDISK 2.5+ > Guest panics > > IDE disk: > ata0-0: QEMU HARDDISK ATA-7 Hard-Disk > Guest panics > > --- > > Please note the difference in the SATA disk between Xen and KVM. As far as > I know, both are using the same version of QEMU. Does anyone know how to > get the SATA disk to show up as an ACHI disk (instead of lsi) using > virt-manager/libvirt on Xen? > > Thanks in advance! > > ~Micah > -- > xen mailing list > xen@xxxxxxxxxxxxxxxxxxxxxxx > https://lists.fedoraproject.org/admin/lists/xen@xxxxxxxxxxxxxxxxxxxxxxx -- xen mailing list xen@xxxxxxxxxxxxxxxxxxxxxxx https://lists.fedoraproject.org/admin/lists/xen@xxxxxxxxxxxxxxxxxxxxxxx
