On Mon, Feb 09, 2015 at 09:18:15AM +0800, Fam Zheng wrote: > On Fri, 02/06 11:23, Fam Zheng wrote: > > On Thu, 02/05 15:29, massimo buscato wrote: > > > Hi all! > > > > > > About virtio-scsi driver: > > > There are many problem to use it on windows 2012 cluster service. > > > > > > Every time you try to validate a Virtio disk under W2012 cluster tool, > > > you have this errors: > > > > > > with VIRTIO DISK device: > > > "The port driver used by the disk does not support clustering. Disk > > > bus type does not support clustering. Disk partition style is MBR. > > > Disk type is BASIC." > > > > > > with VIRTIO SCSI DISK device: > > > "The port driver used by the disk does not support clustering. Disk > > > bus type does not support clustering. Disk partition style is MBR. > > > Disk type is BASIC. The required inquiry data (SCSI page 83h VPD > > > descriptor) was reported as not being supported. " > > > > Hi Massimo, > > > > I don't know much about Windows cluster service but I think this error is > > because virtio-scsi is a direct attached controller, like explained in: > > > > http://support.microsoft.com/kb/2839292?wa=wsignin1.0 > > > > Discussed a bit with Massimo off-list, this feature basically means two > systems > can see the same lun at the same time, and one of them accesses it. When one > system is down, the other takes over. In VMware a disk with RDM (raw device > mapping) could be added, so I think scsi-block and/or scsi-generic should work > too. > > If I understand correctly, Massimo uses image based scsi-disk. > scsi-{block,generic} requires a scsi target on host side. In order to use an > image file, we could use iscsi service to export the host image and use the > iscsi driver in QEMU. Not sure if there are simpler ways.
Sounds like emulating SCSI clustering features (like reservations) on top of a host file system - but this needs to work across multiple hosts. Massimo: Can you describe the shared storage setup you are using? Stefan
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