[root@localhost ~]# mount -vv 10.0.0.12:/i-data/7d9aa331/nfs/backups /mnt
mount: no type was given - I'll assume nfs because of the colon
final mount options: '(null)'
mount.nfs: timeout set for Wed Mar 25 10:50:38 2015
mount.nfs: trying text-based options 'vers=4,addr=10.0.0.12,clientaddr=192.168.1.9'
mount.nfs: mount(2): Protocol not supported
mount.nfs: trying text-based options 'addr=10.0.0.12'
mount.nfs: prog 100003, trying vers=3, prot=6
mount.nfs: trying 10.0.0.12 prog 100003 vers 3 prot TCP port 2049
mount.nfs: portmap query retrying: RPC: Program/version mismatch
mount.nfs: prog 100003, trying vers=3, prot=17
mount.nfs: trying 10.0.0.12 prog 100003 vers 3 prot UDP port 2049
mount.nfs: portmap query failed: RPC: Program/version mismatch
mount.nfs: prog 100003, trying vers=2, prot=6
mount.nfs: trying 10.0.0.12 prog 100003 vers 2 prot TCP port 2049
mount.nfs: prog 100005, trying vers=1, prot=17
mount.nfs: trying 10.0.0.12 prog 100005 vers 1 prot UDP port 4799
10.0.0.12:/i-data/7d9aa331/nfs/backups on /mnt type nfs (rw)