Suspending Spooling Activity to the Unit Record Devices
To suspend spooling activity to the unit record devices, respond to
CP's start prompt with the DRAIN option and either WARM, FORCE,
COLD, or CLEAN. For example, if you want CP to perform a warm start
and suspend all spooling activity to the unit record devices, enter:
warm drain To
start spooling activity to some or all of these unit record devices,
enter the appropriate START commands. (To find out how to start a
device, look under the device in Controlling Local Devices.)