When I mount my DNS-321 NAS using NFS I get 5-10x the speed of mounting it via SMB, BUT I cannot create new directories. I can copy files, but mkdir fails.
$ sudo mount_nfs -P 10.0.0.99:/mnt/HD_a2/TV2 /TV2
Password:
$ rsync -aOP --no-o --no-g * /TV2/
sending incremental file list
B5/B5.S01E01.avi
365238272 100% 39.07MB/s 0:00:08 (xfer#1, to-check=10/21)
$ mkdir /TV2/B5/S2
mkdir: /TV2/B5/S2: Permission denied
$ mkdir /TV2/test
mkdir: /TV2/test: Permission denied
If I mount the same folder via SMB, I can create directories with no problem, but I get 4-7MB/s