System Control Blocks

Offset
113 (71) • 1
114 (72) •• 2
113 (71) • 3
116 (74) 1
117 (75) • 1
118 (76) •• 30
148 (94) 1
149 (95) • 3
152 (98) 3
Bytes and Field
Alignment Name
JFCCPRI
1 •••
• 1 •.
• .1.
• •• x xxxx
JFCSOWA
JFCOUTLI
JFCBNVOL
JFCBVOLS
JFCBEX'l'L
JFCBEXAD
JFCBPQTY
155 (9B) ••• 1 JFCBCTRI
00 ••
01 ••
10 ••
11 ••
• .xx
1 •••
. 1 ..
•• 1 •
• • • 1
156
160
163
166
168
171
174
175
(9C) 3 JFCBSQTY
(9 F) ••• 1 JFCFLGS1
1 ••.
.xxx xxx.
• . • 1
(AO) 3 JFCBDQTY
(A3) ••• 3 JFCBSPNM
(A6) •• 2 JFCBABST
(A8) 3 JFCBSBNM
(AB) • 3 JFCBDRLH
(AE) •• 1 JFCBVLCT
(AF) • 1 JFCBSPTN
JOB FILE CONTROL BLOCK
Field Description, Contents, Meaning
QTAM:
Priority
Code
S
E
R
between send and receive operations.
Send priority.
Equal priority •
Receive priority.
(Reserved bits)
QTAM:
Length, in bytes, of the user provided work area.
SMF - SYSOUT Limit:
Binary representation of the OUTLIM= parameter on the
SYSOUT 00 statement. The maximum number of logical
records specified for this output data set.
Reserved.
Number of volume serial numbers.
Volume serial numbers (the first five).
Reserved.
Relative track address (TTR) of first JFCB extension
block (block of extra volume serial numbers).
Primary quantity of direct access storage required.
space parameters.
ABSTR request.
Average block length request.
TRK request.
CYL request.
(Reserved bits)
CONTIG request.
MXIG request.
ALX request •
ROUND request.
Secondary quantity of direct access storage required.
Flag byte.
Reserved for model dependent support.
(Reserved bits)
Unit affinity specified for this data set •
Quantity of direct access storage required for a
directory or an embedded index area.
Main storage address of the JFCB with which cylinders
are split.
Relative address of-first track to be allocateQ.
Main storage address of the JFCB from which space is
to be suballocated.
Average data block length.
Volume count.
234 OS system Control Blocks (Release 21.7)
Number of tracks per cylinder to be used by this data
set when split cylinder is indicated.