Comment 3 for bug 1652011

Description of problem:
VM Guests occasionally hard shutdown unexpectedly with error:

"qemu-system-x86_64: block.c:2806: bdrv_error_action: Assertion `error >= 0' failed."

In my environment it only appears to be my Windows 2008R2 guests that are affected, although I know of another environment with SLES guests that are affected. As per email here: http://lists.gnu.org/archive/html/qemu-discuss/2014-06/msg00094.html

Version-Release number of selected component (if applicable):

  * qemu-system-x86-1.6.2-5.fc20.x86_64

How reproducible:

It is difficult to reproduce, it occurs roughly once a week each Guest VM for me.

Additional info:
  * I am running Openstack Icehouse on Fedora 20 (via packstack)
  * Kernels: kernel-3.14.4-200.fc20.x86_64 / kernel-3.14.8-200.fc20.x86_64
  * libvirt-1.1.3.5-2.fc20.x86_64
  * Guest OS: Windows 2008R2
  * Guest VirtIO driver version 0.1-81
  * Guest Storage is via NFS export from a Netapp FAS 6220 cluster.
  * These unexpected shutdowns do not occur for me at busy times for either the guests or the hosts.