Whether or not this is related to my particular catastrophe yesterday, there's inconsitent advice on whether Samba should have posix locking on or off when Gluster is involved. On the one hand, on is advised: http://gluster.org/community/documentation/index.php/Gluster_3.1:_Adding_the_CIFS_Protocol On the other, there's specific advice out there to turn it off, and reports of better behavior afterwards: http://comments.gmane.org/gmane.comp.file-systems.gluster.user/8494 Any further light on this issue will be appreciated. Whit