How to disable NFS fnctl in /etc/fstab?

Oliver Fromme olli at
Mon Sep 8 16:41:58 UTC 2008

Tim Chen wrote:
 > For some reason we want to disable fnctl lock for NFS
 > mounted partition. We can achieve this by the following
 > command: mount_nfs -T -L server:/home /mnt
 > However after several time of failure tests, we still
 > can not make it work in /etc/fstab.
 > server:/home /mnt nfs rw,tcp 0 0

server:/home /mnt nfs rw,tcp,-L 0 0

 > By the way, since the machine is running as a mail server which
 > install postfix,courier-imap, will it happen any kind of data
 > corruption due to NFS fnctl lock disabled?

In general, all programs that access mail files must use
locking for concurrent access.  Without proper locking
you'll get data corruption.  I strongly advise against
running mail software on NFS mounts without locking
(i.e. with the -L option).

Best regards

Oliver Fromme, secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing b. M.
Handelsregister: Registergericht Muenchen, HRA 74606,  Geschäftsfuehrung:
secnetix Verwaltungsgesellsch. mbH, Handelsregister: Registergericht Mün-
chen, HRB 125758,  Geschäftsführer: Maik Bachmann, Olaf Erb, Ralf Gebhart

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