VAXcluster Maintenance

This volume, part of a VAXcluster maintenance training series, provides detailed information on the HSC50 and HSC70 intelligent mass storage controllers. The document covers several key areas:

• Hardware Overview: Detailed descriptions of HSC components, including I/O processors (P.ioc/P.ioj), memory modules (M.std/M.std2), and data channel modules (K.sdi/K.sti).
• System Initialization: A step-by-step breakdown of the boot process for both HSC50 and HSC70, including ROM-based tests and media-based system software loading.
• Diagnostics: Coverage of both offline diagnostics (run via the Offline Diagnostic Loader, or ODL) and inline diagnostics (run during normal system operation).
• DSA Controllers: Concepts related to Digital Storage Architecture (DSA), covering MSCP, SDI, STI, and Disk Standard Disk Format (DSDF).
• Utilities: Descriptions of various maintenance and operational utilities available for the HSC, such as SETSHO, VERIFY, FORMAT, and BACKUP.