IBM 3741 Data Station Reference Manual page 139

Summary of File Transfer Operations (Read or Write)
Mode Drive Termination
Writing (3741 to System) Reading (System to 3741)
1
1 Automatic Single data set only Single data set only
2 1 Manual: FUNCT SEL Multiple data sets with opera- Multiple data sets with operator intervention
upper, T tor intervention between data
between data sets. Each data set is automatic-
sets. Operator can position ally closed. Operator can position to next data
Use mode 1 on last data disk to next data set and con- set and continue.
set for automatic ter- tinue.
mination
Automatic at EOJ when
reading
3 1 or 2 Manual: FUNCT SEL Multiple data sets processed
Multiple data sets are processed automatically.
upper, T automatically. The multi- The multivolume indicator of the label is up-
volume indicator of the label dated along with the EOD address. A blank is
Automatic at EOJ when controls when the end of a inserted if the data is contained on one disk.
reading data set is indicated. A blank a C is inserted if the data is continued on an-
or L indicates the end of a
other disk, and an L is inserted in the last data
data set, a C causes data
set label of continued data. Continuation to
from the next disk (drive 1 drive 2 or back to drive 1 is automatic if these
or 2) to be sent as part of the drives are made ready at the proper times.
same data set.
4 1 or 2
Manual: FUNCT SEL
Multiple data sets processed Multiple data sets are processed automatically.
upper, T automatically as in mode 3
as in mode 3. The 3741 will recognize special
except for special records in- end-of-data and end-of-job records indicated
Automatic at XZ
serted by the 3741. These
by operator options.
message when reading records are created as a result
of an operator action. During
job setup, the characters XVZ
are entered on the display.
At the end of a data set, a
record with XV is sent to the
system. At the end of job, a
record with XZ is sent.
5
1 or 2 Manual: FUNCT SEL Multiple data sets processed
Multiple data sets processed automatically simi-
upper, T automatically in a similar lar to tape to diskette job on the 3747. No
manner to a diskette to tape changes are made to the multivolume indicator
Automatic at EOJ when job on the 3747. A blank or of the label when the end-of-data indicator is
reading
C in the multivolume indi-
received from the system. If EOE is reached
cator of the label causes the
before an end-of-data indicator, the operator
next data set on this disk or
can continue to receive by readying another
the next disk to be sent as label.
part of the current data set.
An L causes an end-of-data
indicator to be sent to tt}e
system.
I/O Adapter 133