Adaptec 44300 User Guide - Page 8

Contents ● 8 9 Managing Your Storage Space About Adaptec Storage Manager 50 Installing Adaptec Storage Manager 50 About the HRCONF Command Line Utility 50 About the ARC Utility 51 About the Adaptec Flash Utility 51 Which Utility Should I Use 51 10 Solving Problems Troubleshooting Checklist 53 Recovering from a Disk Drive Failure 53 Failed Disk Drive Protected by a Hot Spare 53 Failed Disk Drive Not Protected by a Hot Spare 53 Failure in Multiple Arrays Simultaneously 54 Disk Drive Failure in a RAID 0 Array 54 Multiple Failures in the Same Array 54 Resetting the Controller 54 A Introduction to SAS Terminology Used in This Appendix 57 What is SAS?...57 How Do SAS Devices Communicate 58 What's a Phy? ...58 What's a SAS Port 58 What's a SAS Address 59 What's a SAS Connector 59 What do SAS Cables Look Like 59 How are Disk Drives Identified in SAS 59 What are the SAS Connection Options 60 Direct-Attach Connections 60 Backplane Connections 60 SAS Expander Connections 60 How is SAS Different from Parallel SCSI 61 B Understanding RAID RAID Technology Overview 64 Understanding Drive Segments 64 Stripe-Unit Size 64 RAID 0 (Non-RAID Arrays 64 RAID 1 Arrays 65