Error Diagnosis

Summary:

This chapter outlines procedures for managing and maintaining the ETOS operating system, specifically focusing on troubleshooting, system configuration, and data integrity.

• Terminal Management: The TTYSET program allows system managers to add, remove, or reactivate terminals and manage console access for detached jobs without shutting down the system.
• System Configuration: Detailed procedures are provided for modifying ETOS to run from non-system disk drives (drives 1, 2, or 3) if the primary boot drive (drive 0) fails.
• Diagnostics and Recovery: The chapter describes how to diagnose hardware problems using the ERRCPY program (for RK05 disks) and the 3040 program (for System Industries disks). It also covers verifying bad disk blocks using FUTIL and the FREE program to manage free blocks.
• Crash Recovery: A step-by-step procedure is provided for creating "crash dumps" to analyze system failures, including using the CDUMP utility.
• System Structures: The document details internal data structures, including the Master File Directory (MFD), User File Directory (UFD), map blocks, and the FREEBLO.CKS file, which manages disk space allocation.
• Maintenance and Support: Information is provided on the process for reporting bugs via Software Performance Reports (SPRs), managing media (backup packs), and implementing technical updates via mandatory and optional patches.
• Appendices: The document includes references for privileged system commands, error messages, and technical summary letters, along with a comprehensive index of topics covered in the manual.