Maximum Wait between Directory Synchronizations.
This variable specifies the maximum number of seconds that will
elapse between directory synchronization operations. By default,
the nwcm utility's npfs_directory_mandatory_sync_interval
is used. The value can be overridden on a volume-to-volume basis
using the voltab file. If the "Minimum Wait between Directory
Synchronizations" variable is set higher than this value,
"Minimum Wait between Directory Synchronizations"
value is ignored. The default is 900.