LinuxQuestions.org - Example share in smb.conf doesn't work

There is a default share:

Code:

;[public]

;  comment = Public Stuff

;  path = /home/samba

;  public = yes

;  writable = yes

;  printable = no

;  write list = @staff

that should allow only the people in group staff to write, and everyone else gets to read. This is exactly what I want to do, but I can't get it to work.

I have:

Code:

[distros]

  comment = *nix distros

  path = /mnt/lv1/distros

  public = yes

  writable = yes

  printable = no

  write list = @ops

I have added myself as a user both on the base unix system, and samba itself. When I have perms on /mnt/lv1/ to 777, then everybody (even those outside ops) can write. If I have them to anything else, nobody can write. Samba seems to be ignoring the write list = @ops line. Is there anything I can do?