RL11/01 Disk Subsystem

This document serves as a training guide for the RL11 disk controller and RL01/RL02 disk drive subsystem. It covers fundamental theory, including the imbedded servo data format, block diagrams for both the controller and drive, and detailed explanations of subsystem commands such as Get Status, Seek, Read Data, Write Data, and Write Check. Additionally, the manual describes error reporting, head retraction logic, and provides information on diagnostic procedures to verify system functionality.