How Data is Processed and Records Built

The system procedure executing EREP issues commands to write the buffered statistical data from the system-attached devices to the ERDS. The system ERP builds the records in the following stages:

STAGE	ACTION
1	The devices attached to the operating system generate sense data for the events encountered during the day. The sense data can be informational, error-related, or statistical.
2	The ERP of the operating system looks at the sense data. If the sense data indicates that a record should be built, the ERP takes the sense data and places it after the standard header information. The combination of the header information and the sense data becomes the error record.
3	The operating system ERP writes the records onto the system ERDS.

If any of the devices do not respond to the system commands, EREP stops and does not continue until the device that does not respond is brought back online. System diagnostics can be used to determine which device is causing the problem.