If a virtual disk has been created as an NFS device, you must export it to a client.
Hedvig presents a file-based virtual disk to one or more storage proxies as an NFS export, which is then consumed by the hypervisor as an NFS datastore. Administrators can then provision VMs on that NFS datastore. The storage proxy acts as an NFS server that traps NFS requests and translates them into the appropriate RPC (remote procedure call) to the backend.