Figure 5.30 The ratings for possible hosts
Deploying a template is the single circumstance in which SCVMM leverages ODX if
possible, which needs to be a capability of the SAN, and the LUN containing the
template VHDX file must be on the same volume as the LUN that is the target for the
VM deployment for most SANs. If it’s not possible to leverage ODX, SCVMM will try a
regular Fast File Copy, and if that fails, it will resort to using BITS. Figure 5.31 shows
the complete deployment of a VM from a template. Notice the various steps. First a
virtual machine is created, and then the template VHDX file is copied to the target
storage. Step 1.8.2 creates a temporary ISO that contains the answer file that performs
all of the configuration of the guest OS. This ISO is created in the root of the new
virtual machine folder that has the name of the VM. For example, my test1 VM ISO
would be called C:\ClusterStorage\Volume1\test1\test1.iso. This ISO is deleted
after the VM is created, as are the additional virtual DVD drives that are added during
deployment to attach the answer file ISO to as well as the VMM additions.