Hello Paul, Vadim is the owner of virtio-block Windows driver. He will try to help you.
Best regards, Yan. On Mar 23, 2012, at 7:32 PM, Paul Fisher wrote: > Dear Yan, > > We seem to be having some trouble with virtio disk on Windows Server 2008 R2 > running on qemu-kvm. Essentially, when disk IO is stressed, it seems to blue > screen. > > > These are potentially contended disks, since it's public cloud with multiple > customers on the host - the issue could be connected to contention making > disk response slow? > > Pertinent facts: > > * qemu-kvm 1.0 > > * Hosts have linux kernel 3.2.2, 64 bit, AMD Opteron 6128 > > * VM is Windows Server 2008 R2, 64 bit - all patches downloaded from MS > > * Virtio disk drivers are the February 2012 release .2200. Problem is > apparent with the older .2000 driver as well. > > * Blue screen shows failure in viostor.sys - screen cap and minidump are at > http://dl.dropbox.com/u/12332019/2200BSOD.zip > > > * Replication: Yes. Easily. In this case I stressed the disk by running > Crystal Disk mark (a free IO measuring tool). When it got to the 4 KB random > seek tests - I think it was on write - it would consistently blue screen. > > * If it would help, I can provide remote access to this virtual machine if > you wish - it's in our cloud system. > > * qemu-kvm command line: > > > > qemu-kvm -m MEMORY -smp SMP -cpu host -nodefaults -vga cirrus -vnc :1 -drive > if=none,id=block.0,format=raw, cache=writeback,file=drive.img -device > virtio-blk-pci,bootindex=1, > drive=block.0 -monitor stdio > > Any help would be greatly appreciated. > > Regards, > Paul Fisher > Operations Manager > ElasticHosts Ltd
