Types of logrec error records

When the logrec data set or the logrec log stream is initialized, the system begins recording events. The system records the following types of error records, containing device-dependent or incident-dependent information:

• Asynchronous notification records (ANR):
  • External timer reference (ETR) records for information related to Sysplex Timer incidents.
  • Direct access storage device (DASD)-service information message (SIM) records for information concerning servicing needs.
  • Link maintenance information (LMI) records for information for a particular link incident.
• Channel report word (CRW) records for:
  • Channel path error
  • Subchannel error
  • Configuration alert error
  • Monitoring facility error
• Dynamic device reconfiguration (DDR) records for:
  • Operator and system swaps between direct access and magnetic tape devices
  • Operator swaps on unit record devices
• End-of-day (EOD) records for information related to end-of-day and system ending conditions whenever the RDE option has been included in the system.
• Input/output supervisor (IOS) records for information related to IOS recovery actions.
  • Dynamic pathing services validation (DPSV) records for recovery actions.
• Initial program load (IPL) records for information related to system initializations whenever the RDE option has been included in the system.
• Machine check handler (MCH) records for:
  • Central processor failure
  • Storage failure
  • Storage key failure
  • Timer failure
• Miscellaneous data (MDR) records for:
  • Buffer overflow and device failures on buffered log devices
  • Demounts on DASD with buffered logs
  • Demounts by the DFSMSdss program between DASD having buffered logs and removable disk packs
  • Device failures on teleprocessing devices connected to an IBM® communication controller
  • Statistical recording by EREP on DASD with buffered logs
• Missing interruption handler (MIH) records for:
  • Missing I/O interruptions
  • Specified time intervals
  • Recovery actions required
  • Recovery actions performed
• Outboard (OBR) records for:
  • Counter overflow statistics and device failures on devices supported by the teleprocessing access methods
  • End-of-day (EOD) requests
  • Paging I/O errors
  • Permanent channel and I/O device failures
  • Statistic counter overflow
  • Temporary or intermittent I/O device failures
  • Demounts on IBM magnetic tape drives
  • Devices that have their own diagnostic buffers
  • Statistical recording by EREP on DASD with buffered logs
• Subchannel logout handler (SLH) records for channel errors.
• Software records, including:
  • Machine checks (hardware-detected hardware errors, such as software recovery attempts for hard machine failures)
  • Program checks (hardware-detected software errors)
  • Restart errors (operator-detected errors)
  • Lost record errors (count of the records that did not fit in the buffer to be written to the logrec data set)
  • Software-detected errors, such as:
    • Abnormal ends, which are also called abends; reported in software records or erroneous supervisor call (SVC) instructions. These are known as SDWA-type software records.
    • Errors that are not abnormal ends; reported in symptom records.
    • Errors generated by application programs or system components; reported in symptom records.