When upgrading a Virtual Steelhead appliance, what steps can be taken to preserve the existing datastore?

A.
When upgrading a Virtual Steelhead appliance, it is not possible to preserve the existing datastore

B.
Detach the existing datastore and re-attach to the new Virtual Steelhead appliance

C.
Run vMotion and move the datastore to a different ESX host before performing the upgrade and then bring
it back afterwards

D.
Move the existing datastore to an NFS share and move it back after the upgrade