unit record devices after the file currently being processed has
coapleted. This
.device to a controlled halt, or halts the activities on a device whose
spooling status is to be changed. For
are usually drained before
drained before the contents of the
command is issued; otherwise, it is drained when processing of the
current file has completed.
START command. If START is issued to a device before draining is
complete, the device does not enter the drained status but continues
processing. The format of the DRAIN command is:
DRain
,
drains the printer.
drains the punch.
ALL drains spooled unit record devices in the
status.
{
a
From one to four classes are
devices drained.
72
the drained device was