LSI MegaRAID SCSI 320-2 RAID Controller Series 518 User Manual Page 40
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3-4 RAID Levels
Copyright © 2002 by LSI Logic Corporation. All rights reserved.
Figure 3.2 RAID 1 Array
3.4 RAID 5
RAID 5 includes disk striping at the byte level and parity. In RAID 5, the
parity information is written to several drives. RAID 5 is best suited for
networks that perform many small I/O transactions simultaneously.
RAID 5 addresses the bottleneck issue for random I/O operations. Since
each drive contains both data and parity, numerous writes can take place
concurrently. In addition, robust caching algorithms and hardware based
Segment 1
Segment 2
Segment 3
Segment 1 Duplicated
Segment 2 Duplicated
Segment 3 Duplicated
Segment 4 Segment 4 Duplicated
MegaRAID Controller
- MegaRAID 1
- SCSI 320-2 1
- RAID Controller 1
- HARDWARE 1
- FCC Regulatory Statement 3
- Logical Drive Configuration 8
- Physical Device Layout 10
- Contents 15
- Contents xvii 17
- Contents xix 19
- Chapter 1 21
- Overview 21
- 1.2 NVRAM and Flash ROM 22
- 1.3 SCSI Connectors 22
- 1.7 Documentation 23
- • MegaRAID Manager 24
- • Power Console Plus 24
- Chapter 2 25
- Introduction to RAID 25
- 2.1.2 Increased Reliability 26
- 2.2.1 Host-Based RAID 26
- 2.3 RAID Overview 27
- 2.3.3 Consistency Check 28
- 2.3.4 Fault Tolerance 28
- 2.3.5 Disk Striping 28
- RAID Overview 2-5 29
- MegaRAID Controller 29
- 2.3.6 Disk Mirroring 30
- 2.3.7 Disk Spanning 31
- 2.3.8 Parity 32
- 2.3.9 Hot Spares 32
- 2.3.10 Hot Swapping 33
- 2.3.11 Disk Rebuild 33
- 2.3.12 Logical Drive States 34
- 2.3.13 SCSI Drive States 34
- 2.3.14 Disk Array Types 35
- 2.3.15 Enclosure Management 35
- 2-12 Introduction to RAID 36
- Chapter 3 37
- RAID Levels 37
- 3.2 RAID 0 38
- 3.3 RAID 1 39
- 3.4 RAID 5 40
- Figure 3.3 RAID 5 Array 41
- 3.5 RAID 10 42
- 3.6 RAID 50 43
- Figure 3.5 RAID 50 Array 44
- Chapter 4 45
- Features 45
- 4-2 Features 46
- 4.1 SMART Technology 47
- 4.2 Configuration on Disk 47
- 4.3 Configuration Features 47
- 4.5 RAID Management Features 49
- 4.6 Fault Tolerance Features 50
- 4.7 Software Utilities 50
- 4.10 MegaRAID Components 52
- 4.10.2 Cache Memory 53
- 4.10.3 MegaRAID BIOS 53
- 4.10.4 Onboard Speaker 53
- 4.10.5 Serial Port 53
- 4.10.6 SCSI Bus 54
- 4.10.7 SCSI Connectors 54
- 4.10.8 SCSI Termination 54
- 4.10.9 SCSI Firmware 54
- 4.11 RAID Management 55
- 4.12 Compatibility 56
- Chapter 5 57
- Configuring Physical Drives 57
- Arrays, and Logical Drives 57
- 5.1.5 Physical Device Layout 62
- 5.2 Configuring Arrays 65
- 5.3 Creating Logical Drives 66
- 5.3.2 Assigning RAID Levels 68
- 5.4 Configuring Logical Drives 69
- Chapter 6 73
- Hardware Installation 73
- 6.2 Installation Steps 74
- 6.2.1 Step 1: Unpack 75
- 6.2.2 Step 2: Power Down 75
- 6-4 Hardware Installation 76
- 6-6 Hardware Installation 78
- 6.2.5 Step 5: Set Termination 80
- Installation Steps 6-9 81
- 6-10 Hardware Installation 82
- Installation Steps 6-11 83
- • Tape drive set to SCSI ID 2 84
- Installation Steps 6-13 85
- Installation Steps 6-15 87
- 6-16 Hardware Installation 88
- Installation Steps 6-17 89
- 6-18 Hardware Installation 90
- 6.2.11 Step 11: Power Up 92
- 6.3 Summary 93
- 6-22 Hardware Installation 94
- Chapter 7 95
- Installing and Configuring 95
- Clusters 95
- 7.2 Benefits of Clusters 96
- Advanced Server 97
- 7.3.2 Network Requirements 98
- 7.4 Cluster Installation 99
- • Set up networks 100
- • Set up disks 100
- 7.4.3 Setting Up Networks 101
- Cluster Installation 7-9 103
- Cluster Installation 7-13 107
- Cluster Installation 7-15 109
- Cluster Installation 7-17 111
- Cluster Installation 7-19 113
- Cluster Installation 7-21 115
- Cluster Installation 7-23 117
- Cluster Installation 7-25 119
- 7.4.18 Verifying Installation 120
- 7.5 Installing SCSI Drives 121
- Chapter 8 123
- Troubleshooting 123
- Firmware Initializing 124
- 8.2 BIOS Boot Error Messages 125
- 8.3 Other BIOS Error Messages 127
- 8.4 Other Potential Problems 127
- 8-8 Troubleshooting 130
- Appendix A 131
- SCSI Cables and 131
- Connectors 131
- SCSI devices is shown below 133
- Table A.1 SCSI Cable Vendors 136
- Appendix B 141
- Audible Warnings 141
- B-2 Audible Warnings 142
- Appendix C 143
- Glossary 143
- C-2 Glossary 144
- C-4 Glossary 146
- C-6 Glossary 148
- C-8 Glossary 150
- C-10 Glossary 152
- IX-2 Index 154
- Index IX-3 155
- IX-4 Index 156
- Customer Feedback 157
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