Hi!
We have a Windows Server 2012 Hyper-V cluster. The VHDX files is stored on a FC connected EVA P6300 SAN.
When I try to disable Write Cache on the disk I get an error saying "Windows could not change the write-caching setting for the device. Your device might not support the feature or changing the setting". This is a Windows Server 2008 R2 guest.
On the guests running on a VMware ESX(i) x.x installation, this is not an issue. The guest is stored on the same SAN, but on other Vdisks of course.
Guest VM additions is version 6.2.9200.16384
Update: Write Cache is disabled on the storage connected to the Hyper-V host.
Anyone?
-ae