VAXcluster Disk I/O Internals Manual

This document is a manual describing the internals of performing MSCP access to disks. It covers the VAXcluster Disk I/O architecture, including concepts like SCA and SCS, and details the DUDRIVER I/O database, $QIO System Service, and DUDRIVER. It also delves into disk class driver error handling and bugchecks, MSCP server operations, and data structures. The manual is intended for senior-level Field Service and Software Services employees.