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Preface

Dell™ PowerVault™ 220S and 221S Systems Service Manual

Read This First

Prerequisites for using this manual to service your system is a basic knowledge of IBM®-compatible PCs, prior training in IBM-compatible PC troubleshooting techniques, and experience troubleshooting SCSI storage enclosures. In addition to this manual and the User's Guide that came with your system, the Installation and Troubleshooting Guide provides installation and configuration information, including cabling diagrams and setup procedures. Your array management software documentation provides information on configuring and managing your storage system.

This manual is divided into the following sections:

• "System Overview" — Overview of the system's features, components, and technical specifications
  
  
• "Basic Troubleshooting" — Initial checks and procedures used to solve basic system problems
  
  
• "Removing and Replacing Parts" — Removal and replacement of all field-replaceable parts, including power supplies, cooling modules, enclosure management modules (EMM), split-bus modules, and the SCSI backplane

Notes, Notices, and Cautions

Throughout this manual, there may be blocks of text printed in bold type or in italic type. These blocks are notes, notices, and cautions, and they are used as follows:

NOTE: A NOTE indicates important information that helps you make better use of the system.

NOTICE: A NOTICE indicates either potential damage to hardware or loss of data and tells you how to avoid the problem.

CAUTION: A CAUTION indicates a potential for property damage, personal injury, or death.

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