HALT command

Use the HALT command to record statistics before stopping the operating system. After you have stopped all subsystem processing (through the use of the appropriate subsystem command) and the system notifies you that all system activity has completed, you can issue the HALT EOD command to ensure that important job and system statistics and data records in storage are recorded.

Note: Do not use the HALT command if you intend to keep running, because this command:

closes the system log
allows SMF to continue writing records after switching to a new data set. During the next IPL, you might see message IEE949I, indicating the presence of old SMF data from a previous IPL. This SMF data was written after HALT was issued.