DECsystem 5100 PrestoServe/NVRAM Option Information

This document is a technical guide for the PrestoServe/NVRAM option for the DECsystem 5100. It covers:

• Product Description: Explains the function of the PrestoServe/NVRAM option as a nonvolatile disk write cache for improved I/O performance.
• Installation: Provides step-by-step instructions for installing the NVRAM modules, including safety precautions, system access, and memory bank configuration requirements.
• Operation: Describes how to perform power-up self-tests, interpret diagnostic results, and utilize privileged console commands (prcache, conf) to manage and diagnose the option.
• Troubleshooting: Details fault isolation procedures for the NVRAM modules, handling failed modules, and recovering cache data if the system module is replaced.