For some dumb reason ro is the default.  Use rw if you want that.

Remainder of this file all specific to v4.

BEWARE:  Need like 120 s. after getting a new mount before can read and write consistently.

I believe that the following options are only for use with export dirs that are nested.
    fsid=0 (or =root) for parent dir, which dir is mounted specifying hostname:/
    consider nohide and crossmnt options

Without any nesting, this is all you need:  rw,no_subtree_check
                but these work too:  rw,root_squash,sync,no_subtree_check

I have so far failed to get root-writing to work, regardless of root_quash option.


Archlinux NFS installation/config HOWTO is great!
For NFS4 at least, must have all shares under a global nfs share root dir,
but can use bind mounts to export stuff from anywhere.
Clients specify mount points inside the share root, relative the share root,
  like to mount/mount/root/a/b you must use:  nfsserver.admc.com:/a/b
Intermediate directories between the share root and the mount dir must have
  world execute privs.

Though commandline mount commands work like hostname:/abs/path,
you should probably use hostname:/relative/to/server/nfs/root
because that's what's required in fstab entries.


no_root_squash option does not work for nfs4 for me.