samba - Mar 2009 - sys_get_vfs_quota

i am getting the following im my logs at the same time when a client disconnects
and reports network name not available error.

sys_get_vfs_quota() failed for mntpath[] bdev[/dev/gpfs] qtype[*] id[*]: No such
device

Also can someone tell me what (numopen=3) mean? On my samba server which are
managed by ctdb, when ever numopen goes above 2, the ove error message is
reported.

Thanks