...don't try and create samba shares on top of NTFS formatted partitions.
Honestly it's been a ongoing problem for the last few months. My first lot of shares just worked on NTFS so I tried to duplicate the setup over other machines including my laptop and my ubuntu home server. Did it ever work? No. So I've finally juggled the data around and formatted all the drives in my ubuntu home server Ext3 (i was tempted with reiser3 but couldn't see the point) and now finally setup the shares. As expected, with some tweaking of my /etc/fstab file its all working correctly.
December 17, 2007