MIH records are created whenever an expected interrupt fails to occur in a preset time interval. They are produced for missing channel-end (primary status) and device-end (secondary status) interrupts on non-TP devices. The records use fields from the unit control block (UCB) to define the origin and status of the missing interrupt.
In VSE, only the Advanced Function system produces MIH reports.
Figures containing examples of these reports are on the pages shown in the following table:
| REPORT | Refer To |
|---|---|
| MIH (370) Detail Edit Report | Figure 1 |
| MIH (370) Detail Summary Report | Figure 2 |
| MIH (370XA) Detail Edit Report | Figure 3 |
| MIH (370XA) Detail Summary Report | Figure 4 |
| MIH (370XA) Detail Edit Report for zHPF | Figure 5 |
--- RECORD ENTRY TYPE - MIH SOURCE - MIH MODEL - 9375 SERIAL NO. 234567
V370 REL. 06
DAY YEAR HH.MM.SS.TH JOB IDENTITY SYSTEM
043 97 18 57 22 12 E2E8E2E3C5D44040
UCB DEVICE TYPE 00002107
PRIMARY CHANNEL UNIT ADDRESS 000C41
ALTERNATE CHANNEL UNIT ADDRESS 000C41
CHANNEL SET ID 00
MISSING INTERRUPT C0
HH MM SS.TH
TIME INTERVAL 00 00 15.00
VOLUME SERIAL NUMBER VMRESA
HEX DUMP OF RECORD
HEADER 70660800 C0000000 0097043F 01081232 10234567 93750000
0000 E2E8E2E3 C5D44040 000C4000 0C40E5D4 D9C5E2C1 00002107 F0F0F0F0 F1F5F0F0
0020 00000000SUMMARY OF MIH RECORDS CUA 000C40
DAY YEAR DAY YEAR
RECORD DATE RANGE 043 97 043 97
MODEL - 9375 SERIAL NO - 234567
TOTAL NUMBER OF RECORDS=0001DEVICE NUMBER: 02300 REPORT: MIH EDIT DAY YEAR JOB IDENTITY: *MASTER*
SCP: VS 2 REL. 3 DATE: 260 04 5CD4C1E2E3C5D95C
DEVICE NED: 002105.000.IBM.075.000000012252.0615
DEVICE TYPE: 3390
CPU MODEL: 2084 HH MM SS.TH
CHANNEL PATH ID: N/A CPU ID: 0190CC TIME: 05 34 30.13
MISSING INTERRUPT: 10 - START PENDING IN SUBCHANNEL SUBCHANNEL ID NUMBER: 000100EF
VOLUME SERIAL: D83RL7
HH MM SS.TH UCB LEVEL BYTE: 01
TIME INTERVAL: 00 00 15.00
RECOVERY ACTIONS PERFORMED BYTE: AC 1
HALT OR CLEAR SUBCHANNEL 1
SIMULATED INTERRUPT 0
REDRIVE DEVICE 1
REQUEUE I/O REQUEST 0
ISSUE MESSAGE 1
LOG THE CONDITION 1
BIT 6 0
BIT 7 0
HEX DUMP OF SUBCHANNEL INFORMATION BLOCK
OFFSET 02106BC8 289F237A C00040C0 10C3FFC0
0010 40440000 00000000 00000001 00804400
0020 5BD52000 10000004 00000000 00000000
0030 00000000
HEX DUMP OF RECORD
HEADER 71831800 00000000 0004260F 05343013 000190CC 20848000
0018 5CD4C1E2 E3C5D95C 02106BC8 289F237A C00040C0 10C3FFC0 40440000 00000000
0038 00000001 00804400 5BD52000 10000004 00000000 00000000 00000000 F0F0F0F0
0058 F1F5F0F0 10BCBCAC 000110EF 289CC040 C0404400 00000000 00010800 00000100
0078 00002300 0800801B 2024C4F8 F3D9D3F7 0010C000 01230000 00000100 00001001
0098 00806600 00120100 00000146 00020001 00A2F0F0 F2F1F0F5 F1F2F3C9 C2D4F1F3
00B8 F7F6F5F4 F3F2F1F1 F9F8F3F1 C1C2C3C4 40E2E8E2 E3C5D440 40404040 40404040
00D8 40404040 4040D0D0 D0D0E0E0 E0E0F0F0 F0F0A0A0 A0A0F0F0 FFFFDEVICE NUMBER: 02300 REPORT: MIH SUMMARY REPORT DATE: 289 04
PERIOD FROM: 260 04
DEVICE TYPE: 3390 CPU MODEL: 2084 TO: 260 04
CPU ID: 0190CC
MISSING INTERRUPT
MISSING CSCH 00000000
MISSING HSCH 00000000
IDLE DEVICE WITH WORK QUEUED 00000000
START PENDING IN SUBCHANNEL 00000001
I/O TIMEOUT CONDITION FOR
ACTIVE I/O REQUEST 00000000
I/O TIMEOUT CONDITION FOR
QUEUED I/O REQUEST 00000000
MOUNT PENDING 00000000
MISSING PRIMARY STATUS 00000000
MISSING SECONDARY STATUS 00000000DEVICE NUMBER: 02300 REPORT: MIH EDIT DAY YEAR JOB IDENTITY: *MASTER*
SCP: VS 2 REL. 3 DATE: 260 04 5CD4C1E2E3C5D95C
DEVICE TYPE: 3390
CPU MODEL: 2084 HH MM SS.TH
CHANNEL PATH ID: N/A CPU ID: 0190CC TIME: 05 34 30.13
MISSING INTERRUPT: 10 - START PENDING IN SUBCHANNEL SUBCHANNEL ID NUMBER: 000110EF
VOLUME SERIAL: D83RL7
HH MM SS.TH UCB LEVEL BYTE: 01
TIME INTERVAL: 00 00 15.00
RECOVERY ACTIONS PERFORMED BYTE: AC
HALT OR CLEAR SUBCHANNEL 1
SIMULATED INTERRUPT 0
REDRIVE DEVICE 1
REQUEUE I/O REQUEST 0
ISSUE MESSAGE 1
LOG THE CONDITION 1
BIT 6 0
BIT 7 0
HEX DUMP OF SUBCHANNEL INFORMATION BLOCK
OFFSET 02106BC8 289F237A C00040C0 10C3FFC0
0010 40440000 00000000 00000001 00804400
0020 5BD52000 10000004 00000000 00000000
0030 00000000
COMMAND CODE: 00 I/O DRIVER ID: 12
STATUS: DEVICE RESERVED BY ANOTHER SYSTEM
INTERROGATE INFORMATION:
FORMAT: F0 FLAGS: F0 CU STATE: A0 DEVICE STATE: A0 I/O STATE: A0
STATE DEPENDENT DATA: FFFF2794 2D4D2794 2D4D2794
DEVICE LEVEL ID: 2D4D2861
DEVICE DEPENDENT DATA: 2D4D2895 00000000 01000000 2D4D25C6
00000000 00000000 F1FDF0F0
INTERROGATE INFORMATION:
OFFSET C0000004 F1F1F1F1 F2F2F2F2 F3F3F3F3
0010 F4F4F4F4 F5F5F5F5 F6F6F6F6 F7F7F7F7
0020 F8F8F8F8 10203040 A0A0A0A0 B0B0B0B0
0030 C0C0C0C0 D0D0D0D0 E0E0E0E0 F0F0F0F0
0040 A0A0A0A0 F0F0FFFF 27942D4D 27942D4D
0050 27942D4D 28612D4D 28950000 00000100
0060 00002D4D 25C60000 00000000 0000F1FD
0070 F0F0F0F9 00000000 00000096 00000101
0080 000F0000 00000000 00000000 00000000
0090 00000000 00000000 00000000
HEX DUMP OF RECORD
HEADER 71831800 00000000 0004260F 05343013 000190CC 20848000
0018 5CD4C1E2 E3C5D95C 02106BC8 289F237A C00040C0 10C3FFC0 40440000 00000000
0038 00000001 00804400 5BD52000 10000004 00000000 00000000 00000000 F0F0F0F0
0058 F1F5F0F0 10BCBCAC 000110EF 289CC040 C0404400 00000000 00010800 00000100
0078 00002300 0800801B 2024C4F8 F3D9D3F7 0010C000 01230000 00000100 00001001
0098 00806600 00120100 00000146 00010001 00A2C000 0004F1F1 F1F1F2F2 F2F2F3F3
00B8 F3F3F4F4 F4F4F5F5 F5F5F6F6 F6F6F7F7 F7F7F8F8 F8F81020 3040A0A0 A0A0B0B0
00D8 B0B0C0C0 C0C0D0D0 D0D0E0E0 E0E0F0F0 F0F0A0A0 A0A0F0F0 FFFF