[Users] Extremely poor disk access speeds in Windows guest

Backing Storage: Gluster Replica Storage Domain: NFS Ovirt Hosts: CentOS 6.5 Ovirt version: 3.3.2 Network: GigE # of VM's: 3 - two Linux guests are idle, one Windows guest is installing updates. I've installed a Windows 2008 R2 guest with virtio disk, and all the drivers from the latest virtio iso. I've also installed the spice agent drivers. Guest disk access is horribly slow, Resource monitor during Windows updates shows Disk peaking at 1MB/sec (scale never increases) and Disk Queue Length Peaking at 5 and looks to be sitting at that level 99% of the time. 113 updates in Windows has been running solidly for about 2.5 hours and is at 89/113 updates complete. I can't say my Linux guests are blisteringly fast, but updating a guest from RHEL 6.3 fresh install to 6.5 took about 25 minutes. If anyone has any ideas, please let me know - I haven't found any tuning docs for Windows guests that could explain this issue. Thanks, *Steve Dainard *