Error Diagnosis

This chapter outlines troubleshooting and non-standard maintenance procedures for the ETOS operating system. It covers the following key areas:

• Terminal Management via TTYSET: The document describes the TTYSET program, which allows system managers to add, remove, enable, disable, or reset terminals without shutting down the system. It provides a detailed command reference for these functions and lists common error messages encountered when using the utility.
• System Startup from Non-System Drives: It provides instructions for running ETOS from an RK05 disk pack located in drive 1, 2, or 3, a procedure typically used as a contingency when the primary system drive (drive 0) experiences hardware failure. This involves bootstrapping the system pack and using the CONFIG program to update memory settings.

The chapter emphasizes that while standard operations are automated, the system manager must be prepared to handle exceptions, perform emergency configurations, and interpret diagnostic messages to maintain system availability.