CLEAN_REQUEST_TIMEOUT entry in vm.conf
Use this entry to specify how long NetBackup waits for a drive to be cleaned before it removes the cleaning request from the cleaning queue. Unprocessed requests to clean a drive are removed from the queue after 30 minutes.
CLEAN_REQUEST_TIMEOUT = minutes
The minutes can be from 1 to 144000 (100 days). The default value is 30 and a value of zero converts to the default value of 30.