Unable to unmount vhd provisioning server
When mounting a VHD file using the provisioning server console you normally get an orange arrow which indicates the vDisk is mounted, but sometimes you don’t receive the arrow and then you can’t unmount the vdisk.
To unmount a vDisk which isn’t indicated as mounted in the Provisioning Services console, use cvhdmount.exe.
cvhdmount.exe is at the following location: C:\Program Files\Citrix\Provisioning Services\.
Use the following command: cvhdmount.exe -u <sn> where <sn> is the serial number and must be greater than zero, in my case I didn’t mounted other vDisks so went for number 1 and did worked for me.