Channel Subsystem Exception

This report is organized according to the possible source of channel checks:

The channel
The storage control unit
The controller

It shows the number of times each of these error types exceeded the LIMIT values for specific channels or controllers.

Figure 1 shows an example of the channel subsystem exception report.

Figure 1. Channel Subsystem Exception Report

    1 

SUBSYSTEM EXCEPTION                       REPORT DATE 065 97
    CHANNEL                               PERIOD FROM 041 97
                                                 TO   059 97
      2 
MODEL 3033   SERIAL 021595   CPU 01


     3                                4                    5              6                            .
SERVICE LEVEL INDICATOR          EXCEPTION COUNT      TOTAL COUNT    DATE/TIME OF LAST ERROR
                               60 MINUTE REFERENCE


  CHANNEL ERROR

      CHANNEL 6XX                         3                   4      043/97   18:47:38:67
      CHANNEL 1XX                         1                   1      048/97   21:22:23:43
      CHANNEL 2XX                         1                   1      052/97   11:34:43:65
      CHANNEL 8XX                         1                   1      059/97   11:43:32:87



  DIRECTOR ERROR

      DIRECTOR #1                         1                   1      041/97   19:32:54:89
      DIRECTOR #2                         1                   1      045/97   13:25:46:57
      DIRECTOR #3                         1                   1      057/97   11:24:36:57



  CONTROL UNIT ERROR

      CONTROL UNIT 34X                    1                   1      042/97   13:25:44:57
      CONTROL UNIT 456                    1                   1      056/97   13:32:22:37



LIMITS APPLIED   CHAN=01,DRCT=01,CTRL=01   7 
    0 UNITS EXCLUDED DUE TO LIMITS

    2 CCH RECORDS UNDEFINED TO CCH ALGORITHMS
    2 CCH RECORDS IGNORED BECAUSE OF MCH DUPLICATION   8

1

This space is used for self-explanatory system control program and device-dependent messages specific to this subsystem exception report. For example:

** WARNING ** REPORT SPANS MORE THAN 3 DAYS

2

This report is provided for the following CPUs only:

0158
0168
3031
3032
3033

3

The sources of the channel checks are shown in the following table:

CHANNEL ERROR (31XX/303X)
CHANNEL STORAGE ERROR (31XX) or DIRECTOR ERROR (303X)
CONTROL UNIT ERROR

4

The number of unique 60-minute intervals that had at least the LIMIT value number of this kind of channel check.

5

The count of input records containing this particular error.

6

Date and time of the last CCH record that includes this error. If the date and time are the same for several service level indicators, it means that a single record includes all the indicators.

7

The LIMIT values applied to this report. If the LIMIT value is zero, the EXCEPTION COUNT field is also zero.

8

Execution-time notes. These may be:

NOTE	DESCRIPTION
nn `UNITS EXCLUDED DUE TO LIMITS`	If LIMIT values are present
nn `INPUT RECORDS UNDEFINED`	Not identifiable to EREP as valid CCH records
nn `CCH RECORDS IGNORED DUE TO MCH DUPLICATION`	The number of 0158 or 0168 channel storage errors, or 303X channel errors, ignored because they might be double-reporting a processor storage error
nn `CCH RECORDS FOUND GENERATED FOR SOFTWARE RECOVERY`	The number of sympathetic channel errors found; for 303X only