RD54-D, -R Fixed Disk Drive Subsystem Owner's Manual

This document is the Owner's Manual for the Digital Equipment Corporation RD54-D (desktop) and RD54-R (rackmount) Fixed Disk Drive Subsystems, published in October 1986.

The manual serves as a comprehensive guide for the installation, operation, and maintenance of these 159 Mbyte fixed disk drives. These subsystems are designed as add-on units for MicroPDP-11, MicroVAX, PDP-11/23 PLUS, and other Q-Bus systems, and require an RQDX3 controller module (minimum rev 1.10) for operation, supporting the Digital Storage Architecture (DSA) Mass Storage Control Protocol (MSCP).

Key areas covered in the document include:

1. Installation: Instructions for selecting a location, unpacking the desktop or rackmount models, connecting the subsystem to various host systems (MicroPDP-11, MicroVAX, PDP-11/23 PLUS), checking voltage settings, and the critical disk formatting procedures using XXDP+ or MDM programs. It warns that formatting destroys existing data.
2. Operation: Descriptions of the front panel controls (on/off switch, ready, and write-protect buttons/indicators) and rear panel connectors. It also provides essential care and handling precautions for the delicate precision instrument, such as avoiding physical impact, magnetic fields, and recommending regular data backups and write-protection during tests.
3. Technical Description: Detailed information on the subsystem's physical features, operating characteristics, environmental requirements, power supply specifications, and system configuration details including controller and cable options for different host systems. It clarifies Logical Unit Numbers (LUNs) and Disk Unit Numbers (DUNs).
4. Troubleshooting: A guide for diagnosing minor problems and interpreting error messages during formatting. It includes procedures for removing and replacing Field Replaceable Units (FRUs) like the fixed disk drive, device electronics board, power supply, and fan assembly. The manual repeatedly emphasizes that only qualified field service personnel should perform major repairs or part replacements.

The document also provides information on related documentation, ordering information, and Digital's service options.