For a normal end, the record consists of the 24-byte header. For an abnormal end, the header is followed by fields containing data related to the error.
Offset | Size (bytes) alignment (bits) | Field name | Description | |
---|---|---|---|---|
Dec | Hex | |||
0 | (0) | 1 | CLASRC | Class/Source: |
1... .... | EOD record; type=X'80'. | |||
1... ...1 | System end (non-restartable); type=X'81'. | |||
1... .1.. | EOD from IOS (restartable wait state); type=X'84'. | |||
1 | (1) | 1 | OPSYS | System/Release level: |
100. .... | OS/VS2. | |||
bits 3-7 | ||||
0-1F | Release level 0-31. | |||
2 | (2) | 4 | SW1 | Record switches: |
Byte 0 | ||||
1... .... | More records follow. | |||
0... .... | Last record. | |||
.1.. .... | Time-of-day (TOD) clock instruction issued. Used in conjunction with date and time values at displacements 8 and 12. | |||
..1. .... | Record truncated. (Not used for EOD record.) | |||
...1 .... | Record created by MVS/SP Version 2, 3, or 4. | |||
.... 1... | TIME macro used. | |||
.... .xxx | Reserved. | |||
Bytes 1 and 2 | Not used for EOD record. | |||
Byte 3 | Incremental release number (alphanumeric) of operating system. | |||
6 | (6) | 2 | Not used for EOD record. | |
8 | (8) | 4 | DATE | System date of condition. |
12 | (C) | 4 | TIME | System time of condition. |
16 | (10) | 1 | VERNO | Machine version code. |
17 | (11) | 3 | CPUSER | Central processor serial number. |
20 | (14) | 2 | CPUMODEL | Central processor machine model number. |
22 | (16) | 2 | MCELLNG | Reserved. |
END OF STANDARD HEADER | ||||
24 | (18) | 40 | EOD extension (see note). | |
24 | (18) | 4 | Length of user data plus 8. | |
28 | (1C) | 4 | Wait state code. | |
32 | (20) | 32 | User data. | |
Note: If the wait state code
is X'110', X'111' or X'112', hot I/O recovery
processing writes this ending record. The 32-byte user data field
contains the SCD entry for the channel with the “hot” condition.
See z/OS® MVS™ Data Areas in http://www.ibm.com/systems/z/os/zos/bkserv/ for a detailed description
of the SCD. For other wait state codes that use the EOD extension, the length of the data field and the extension may vary. |