Device Control Data Section

There is one section per device class.

Offsets Name Length Format Description
0 0 SMF74NXT 2 binary Number of Device Control data sections in following records for this class.
2 2 SMF74TOT 2 binary Total number of Device Control data sections in all records for this class.
4 4 SMF74GEN 2 binary Total number of devices specified for all classes at system installation.
6 6 SMF74SUB 2 binary Device class code:
Bit Configuration
Meaning
‘0080’X
Magnetic tape device
‘0040’X
Communication equipment
‘0020’X
Direct access devices
‘0010’X
Graphics devices
‘0008’X
Unit record devices
‘0004’X
Character reader devices.
8 8 SMF74DCF 1 binary Flags for DASD class
Bit
Meaning when set
0
Both sections of report requested
1
Sort by storage group
2-7
Reserved.
9 9 SMF74DMS 1 binary Message flag for DASD class
Bit
Meaning when set
0
Message issued that SMS not available
1
SMS interface error
2-7
Reserved.
Start of change10End of change Start of changeAEnd of change Start of changeSMF74ENFEnd of change Start of change1End of change Start of changebinaryEnd of change Start of changeFlags for environment.
Bit
Meaning when set
0
Extended CMB
1
Model-dependent data not available by STSCH
2
Initial command response time valid (SMF74CMR)
3
Interrupt-Delay-Time facility is provided by channel subsystem
4 -7
Reserved
End of change
11 B   1   Reserved.
12 C SMF74S15 4 binary Contents of register 15 after SMS interface call, zero if normal return.
16 10 SMF74SRC 4 binary Return code from SMS interface, zero if normal return.
20 14 SMF74SRS 4 binary Reason code from SMS interface, zero if normal return.
24 18 SMF74TSR 2 binary Total number of small SMF records.
26 1A SMF74CFL 1 binary Configuration change flags
Bit
Meaning when set
0
Configuration changed. Used to decide whether to provide the text “POR” or “ACTIVATE” on reports. Also used to check whether data can be combined in a duration report.
1
Configuration change since power-on-reset (POR).
2
POR using IOC data set that contains a token.
3
Configuration token is valid.
4-7
Reserved.
27 1B   3   Reserved.
30 1E SMF74TNM 44 EBCDIC IODF name suffix.
74 4A SMF74TSF 2 EBCDIC IODF name suffix.
76 4C   2   Reserved.
78 4E SMF74TOK 16 EBCDIC Partial token information.
78 4E SMF74TDT 8 EBCDIC IODF creation date, in the form mm/dd/yy.
86 56 SMF74TTM 8 EBCDIC IODF creation time, in the form hh.mm.ss.
94 5E   2   Reserved.
96 60 SMF74MCT 4 binary Maximum number of allocated tape devices.

This field is zero for devices other than tape.
100 64 SMF74TDY 10 EBCDIC IODF creation date, in the form mm/dd/yyyy.
110 6E   2   Reserved.
Parent topic: Subtype 1 — Device Activity