The Error Logging System ELS records the following events for diagnostic purposes:
Error events
machine errors
errors related to I/O interrupts
errors in peripheral equipment
other events
statistical information from peripheral equipment
statistical information from the CPU firmware
processor context saves
information from test and diagnostic programs (TDP)
The events are recorded by the HEL system task and documented in the central statistics file which is automatically created. The name of the HEL file has the following structure (yyyy-mm-dd.hhmmss: creation date and time):
$TSOS.SYS.HEL.yyyy-mm-dd.hhmmss
Evaluation of the HEL files is performed by the BS2000 utility routine ELSA.
The HEL task and the BS2000 evaluation program (ELSA) can access the statistics file at the same time. ELSA is described in detail in the “ELSA” manual [3].
Service who is logged on under a user ID which has the HARDWARE-MAINTENANCE privilege can use the following commands to control the saving of HEL records as well as to control and support monitoring by Remote Service:
Command | Meaning |
CHANGE-HEL-FILE | Close the current HEL file and opens a new file |
MODIFY-HEL-CHECK | Control threshold monitoring |
MODIFY-HEL-LOGGING | Control saving of HEL records |
MODIFY-HEL-TELESERVICE-ALARM | Set the error threshold values for Remote Service messages |
SHOW-HEL-CHECK | Request information about threshold value monitoring |
SHOW-HEL-LOGGING | Request information about the logging records |
SHOW-HEL-STATUS | Request general information about hardware error logging |
SHOW-HEL-TELESERVICE-ALARM | Request information about the Remote Service parameters which are set |
START-HEL-LOGGING | Activate the hardware error logging system function and opens the logging file |
STOP-HEL-LOGGING | Terminate the hardware error logging system function and closes the logging file |
Under the TSOS user ID, systems support can use the /SHOW-HEL-STATUS, /START- and /STOP-HEL-LOGGING commands.
The commands are described in detail in the “Commands” manual [8].