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A
Introduction to Serial Attached
SCSI (SAS)
In this appendix...
Terminology Used in This Chapter ....................................................................................... 60
What is SAS? ........................................................................................................................... 60
How Do SAS Devices Communicate?................................................................................... 61
What’s a Phy? .......................................................................................................................... 61
What’s a SAS Port?.................................................................................................................. 62
What’s a SAS Address?............................................................................................................ 62
What’s a SAS Connector?....................................................................................................... 62
What do SAS Cables Look Like?............................................................................................ 63
How are Disk Drives Identified in SAS?................................................................................ 63
What are the SAS Connection Options? ............................................................................... 63
How is SAS Different from Parallel SCSI?............................................................................. 65
This section provides a basic overview of the main features of Serial Attached
SCSI (SAS), introduces some common SAS terms, and explains how SAS differs
from parallel SCSI.
Note:
For technical articles and tutorials about SAS, refer to the SCSI Trade Association
(STA
TM
) Web site at www.scsita.org.
- Installation and User’s Guide 1
- Copyright 2
- Trademarks 2
- Disclaimer 2
- Adaptec Customer Support 3
- Canadian Compliance Statement 5
- Contents 6
- Safety Information 10
- Technical Specifications 10
- About This Guide 11
- How to Find More Information 12
- Kit Contents and System 13
- Requirements 13
- Kit Contents 14
- System Requirements 14
- CD drive 15
- About Your RAID Controller 16
- Array-level Features 17
- Adding Enhanced Features 18
- About the Adaptec 4000SAS 19
- About the Adaptec 4800SAS 20
- About the Adaptec 4805SAS 21
- About the Adaptec 2420SA 22
- About the Adaptec 2820SA 23
- About the Adaptec 2130SLP 24
- About the Adaptec 2230SLP 25
- Getting Started 26
- Choosing a RAID Level 27
- Selecting Disk Drives 28
- Selecting Cables 29
- Installation Options 30
- Basic Installation Steps 30
- In this chapter 31
- Before You Begin 32
- Installing the Controller 32
- SATA disk drives attached to 33
- Disk drives on 34
- Controller connected to 34
- Connecting External Devices 35
- Creating a Bootable Array 36
- Setting the Boot Controller 37
- Creating an Array 37
- Making Your Array Bootable 40
- Installing the Driver and an 41
- Operating System 41
- Creating a Driver Disk 42
- Installing with Windows 43
- Installing with Red Hat Linux 43
- Installing with SuSE Linux 44
- Installing with NetWare 44
- Installing with OpenServer 45
- Installing with UnixWare 45
- Installing with FreeBSD 46
- Installing on Windows 49
- Installing on NetWare 49
- Installing on OpenServer 50
- Installing on UnixWare 50
- Installing on Solaris 51
- Installing on FreeBSD 51
- Managing Your Storage Space 52
- About Adaptec Storage Manager 53
- Which Utility Should I Use? 54
- Solving Problems 55
- Troubleshooting Checklist 56
- Silencing the Alarm 56
- Resetting the Controller 58
- SCSI (SAS) 59
- What is SAS? 60
- What’s a Phy? 61
- What’s a SAS Port? 62
- What’s a SAS Address? 62
- What’s a SAS Connector? 62
- What do SAS Cables Look Like? 63
- Backplane Connections 64
- SAS Expander Connections 64
- Understanding RAID 66
- Understanding Drive Segments 67
- RAID 0 (Non-RAID Arrays) 67
- RAID 1 Arrays 68
- RAID 1 Enhanced Arrays 68
- RAID 10 Arrays 69
- RAID 5 Arrays 70
- RAID 5EE Arrays 71
- RAID 50 Arrays 72
- RAID 6 Arrays 73
- RAID 60 Arrays 73
- Selecting the Best RAID Level 74
- Creating a New Array 76
- Initializing Disk Drives 77
- Rescanning Disk Drives 77
- Managing Existing Arrays 77
- Secure Erasing Disk Drives 78
- Opening a -Select Utility 78
- Applying Changes and Exiting 78
- General Controller Settings 79
- Option Description 80
- Viewing the Event Log 82
- Using the ACU for DOS 83
- Running the ACU Using Scripts 85
- ACU /R <file> 86
- Required 87
- ? Description 87
- HotspareDrives=0:0:0,0:1:0 88
- Type=Volume 88
- Type=RAID1 88
- ACU exits with an error 89
- Keyword Description 90
- ACU Error Codes 91
- Sample Scripts 92
- Running the Menu-based AFU 96
- Running the 97
- Environmental Specifications 103
- DC Power Requirements 103
- Current Requirements 103
- Index ● 105 105
- Index ● 106 106
- Index ● 107 107
- Index ● 108 108
- Adaptec, Inc 109
- 691 South Milpitas Boulevard 109
- Milpitas, CA 95035 USA 109
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