Thanks, the 6.1 documentation is well hidden! But here it is:
3. On the backup repository and on the destination host, Veeam Backup & Replication
deploys a pair of agents that are used to mount the VM disks from the backup file to the
4. On the destination host, Veeam Backup & Replication starts a proprietary Veeam driver.
The driver redirects requests to the file system of the recovered VM (for example, when a
user accesses some application) and reads necessary data from the backup file on the
backup repository via the pair of agents which maintain the disk mount.
With Server 2012 I understand file level storage will be supported in much the same way that NFS is for vSphere, but using SMB 3 - presumably that will streamline this process?