Quiescing RACF activity (MLQUIET option)
If you have the SPECIAL attribute, and MLSTABLE is in effect, you can prevent users other than SPECIAL users, console operators, and started procedures from logging on, starting new jobs, or accessing resources. This prevents them from using the RACROUTE AUTH, DEFINE, and VERIFY requests.
SETROPTS MLQUIET
To cancel this option, specify NOMLQUIET on the SETROPTS command.
Restriction: If SETROPTS MLSTABLE is not in effect, the SETROPTS MLQUIET command is ignored.
Use of the MLQUIET option can prevent a successful IPL of these systems. In addition, if no systems sharing the RACF database are capable of multilevel security, you might have to IPL with RACF inactive and update the database with the block update command (BLKUPD) in order to turn off the MLQUIET option.