Storage Module Drive

This hardware reference manual provides technical information for the Control Data Corporation (CDC) BK7B1E and BK7B1F Storage Module Drives (SMD). The manual is intended for customer engineers and technical personnel involved in maintaining these 300 MB, high-speed, random-access digital storage devices. It includes three primary sections: General Description (Section 1), which details the drive's functional areas and configurations; Operation (Section 2), covering controls, indicators, and operating procedures; and Theory of Operation (Section 3), which provides in-depth technical explanations of the power systems, electromechanical functions, interface functions, seek logic, machine clocks, and read/write circuits. Additionally, Section 4 offers detailed reference information regarding the microcircuits used within the drive, including TTL, ECL, and CMOS logic theories and symbology.