RV20 Optical Disk Subsystem Owner's Manual

This document is the Owner's Manual for the RV20 Optical Disk Subsystem, published by Digital Equipment Corporation in 1988.

The manual provides information for the everyday user of the RV20, which is a random-access, mass storage device utilizing 12-inch removable optical disks. Each disk surface can store 1 gigabyte of information using a laser to write data (once) by burning "pits" and read data (unlimited times) by detecting reflected light. The subsystem can comprise up to four RV20 drives (one master, up to three slaves) housed in a single cabinet, connecting to a VAX host.

Key aspects covered in the manual include:

1. Product Overview & Specifications: Detailed descriptions of the RV20's physical, environmental, and electrical specifications, along with its media characteristics.
2. Software Interaction: Explains that despite being a disk drive, the RV20 functions like a tape device to the host operating system (VAX/VMS), performing sequential write operations. Due to its write-once nature, data cannot be physically erased; "overwriting" means data is logically superseded by new data (via pointers), and initializing a disk consumes additional space. The manual offers software guidance on everyday use, file maintenance, and optimizing data transfer rates and performance.
3. Operation Procedures: Step-by-step instructions on powering up the drive, understanding the front panel controls and indicators, loading and unloading optical disks, spinning them up and down, and using the two methods for write-protecting a disk (front panel switch or physical tab on the cartridge).
4. Maintenance and Problem Solving: Details the only routine user maintenance required: cleaning and replacing the air filter. It also provides instructions for replacing a damaged disk cartridge and cleaning the optical disk. A troubleshooting guide addresses common issues users might encounter, and information on various Digital Field Service repair options is provided.
5. Safety Information: Emphasizes the RV20 as a Class 1 laser product and outlines important safety precautions, such as never removing drive covers or inserting hands into the device.

In essence, the manual serves as a complete guide for operating, maintaining, and understanding the unique characteristics of the RV20 write-once optical disk subsystem for its intended users.