RZ57 Disk Drive Subsystem Service Manual

This service manual provides comprehensive information and procedures for servicing the RZ57 Disk Drive Subsystem, primarily intended for Digital Customer Services personnel. The RZ57 is described as a high-performance, 1.0 Gbytes, 5.25-inch hard disk drive with a Small Computer System Interface (SCSI), designed for random access data storage and retrieval in various Digital products.

The document is structured into two main chapters and an appendix:

• Chapter 1: About the RZ57 Disk Drive details the drive's introduction, configuration, features, and specifications (physical, functional, performance, and environmental). It highlights that the RZ57 is not internally terminated, requiring SCSI bus termination within the host system. This chapter also outlines procedures for the removal and replacement of its two Field Replaceable Units (FRUs): the drive module and the head/disk assembly (HDA).
• Chapter 2: Troubleshooting the RZ57 Disk Drive in a System focuses on diagnostic procedures. It provides a troubleshooting checklist and detailed flowcharts to identify and resolve disk drive-related faults within a system context, emphasizing the reliance on system software diagnostics and proper SCSI bus interface and termination.
• Appendix A: Recommended Spares lists the recommended spare parts and their corresponding order numbers for the RZ57 disk drive.