Adaptec 2170200 User Guide - Page 8

Contents ● 8 9 Managing Your Storage Space About Adaptec Storage Manager 51 Installing Adaptec Storage Manager 51 About the HRCONF Command Line Utility 51 About the ARC Utility 52 About the Adaptec Flash Utility 52 Which Utility Should I Use 52 10 Solving Problems Troubleshooting Checklist 54 Recovering from a Disk Drive Failure 54 Failed Disk Drive Protected by a Hot Spare 54 Failed Disk Drive Not Protected by a Hot Spare 54 Failure in Multiple Arrays Simultaneously 55 Disk Drive Failure in a RAID 0 Array 55 Multiple Failures in the Same Array 55 Resetting the Controller 55 A Introduction to SAS Terminology Used in This Appendix 58 What is SAS?...58 How Do SAS Devices Communicate 59 What's a Phy? ...59 What's a SAS Port 59 What's a SAS Address 60 What's a SAS Connector 60 What do SAS Cables Look Like 60 How are Disk Drives Identified in SAS 60 What are the SAS Connection Options 61 Direct-Attach Connections 61 Backplane Connections 61 SAS Expander Connections 61 How is SAS Different from Parallel SCSI 62 B Understanding RAID RAID Technology Overview 65 Understanding Drive Segments 65 Stripe-Unit Size 65 RAID 0 (Non-RAID Arrays 65 RAID 1 Arrays 66