TOPS-10 Tape Processing Manual

This manual provides a comprehensive guide to the TOPS-10 tape subsystem, focusing on the processing of both labeled and unlabeled magnetic tapes. It is intended for terminal users, programmers, system operators, and system administrators.

Key areas covered in the document include:

• Tape Fundamentals: Definitions and characteristics of magnetic tapes, including records, blocks, volume sets, and recording density.
• Tape Labels: Detailed explanations of label formats (VOL1, UVL1, HDR, EOF, EOV) and their functions in data protection, identification, and error checking.
• Tape Initialization: Procedures for initializing tapes using the SET TAPE-DRIVE INITIALIZE command.
• Operation and Mounting: Management of the mount process, including Automatic Volume Recognition (AVR), volume switching, and handling tape mount errors.
• Programming Interfaces: Descriptions of the TAPOP. monitor call for controlling tape operations, such as positioning, label parameter overriding, and status retrieval.
• Data Structures and Formats: Information on record formats (Fixed, Variable, Spanned, Undefined) and data modes.
• Recovery: Procedures for crash analysis and recovery for the PULSAR and QUASAR components of the TOPS-10 GALAXY system.