HSC70 Mass Storage Server

This service manual covers the HSC70 Mass Storage Server. It includes detailed information on:

• General Information: Subsystem layout, interfaces, and internal software modules (K.CI, K.STI, K.SDI, P.ioj, etc.).
• Controls and Indicators: Descriptions of the Operator Control Panel (OCP), interior controls, and module LEDs.
• Removal and Replacement Procedures: Safety precautions, power removal, and step-by-step procedures for replacing Field Replaceable Units (FRUs) like the RX33 drives, power supplies, logic modules, and blowers.
• Initialization Procedures: Boot sequences, terminal connection, and fault code interpretations.
• Diagnostics: Inline diagnostics (RX33, Memory, Disk, Tape, Multidrive Exerciser) and offline diagnostics (Loader, Cache, Bus Interaction, etc.).
• Troubleshooting: Techniques for identifying and resolving hardware and software errors, with comprehensive tables for fault codes, status bytes, and error messages.