Preface
The SMP11-Ax Parallel Disk Array (PDA) is a random access, hard disk storage
device designed to complement the DECmpp 12000/Sx and DECmpp 12000–LC/Sx
Series Massively Parallel Processing systems.
This document provides a description of the Parallel Disk Array hardware
and how to install and service it. Anyone who services the PDA and needs to
replace any components in it should read this manual and be familiar with the
procedures.
Intended Audience
This guide is for use by Digital Services personnel and by self-maintenance
customers who will be servicing the PDA system. It may also be used by PDA
system administrators.
Document Structure
This manual contains seven chapters and five appendixes:
• Chapter 1 is a general overview of the PDA configurations and components.
• Chapter 2 contains installation procedures, including connecting the PDA to
the DECmpp 12000/Sx system data parallel unit (DPU) and powering up the
PDA.
• Chapter 3 describes system administration procedures for bringing the PDA
online.
• Chapter 4 explains the disk formatting instructions.
• Chapter 5 explains how to replace the various PDA field replaceable units.
• Chapter 6 explains the indicator display and the diagnostic procedures and
tests.
• Chapter 7 describes procedures for upgrading the PDA to larger storage
configurations.
• Appendix A contains PDA configuration data tables.
• Appendix B contains system block diagrams.
• Appendix C lists the PDA recommended spare parts.
• Appendix D lists PDA option variants.
• Appendix E contains PDA-specific reference pages.
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