LSI MegaRAID SCSI 320-1 RAID Controller Series 520 User Manual Page 21
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Single-Ended and Differential SCSI Buses 1-3
Copyright © 2002 by LSI Logic Corporation. All rights reserved.
1.5 Single-Ended and Differential SCSI Buses
The SCSI standard defines two electrical buses:
· Single-ended bus
· Low-voltage differential bus
1.6 Maximum Cable Length for SCSI Standards
Table 1.1 lists the maximum SCSI cable length and number of disk drives
that you can use, depending on the SCSI speeds and type of device.
Table 1.1 Maximum Cable Length for SCSI Standards
Standard
Single Ended
SCSI
Low-Voltage
Differential SCSI
Maximum # of
Drives
Ultra SCSI 1.5 m 12 m 7
Ultra SCSI 3 m 12 m 3
Wide Ultra SCSI 12 m 15
Wide Ultra SCSI 1.5 m 12 m 7
Wide Ultra SCSI 3 m 12 m 3
Ultra 2 SCSI 25 m 1
Ultra 2 SCSI 12 m 7
Wide Ultra 2 SCSI 25 m 1
Wide Ultra 2 SCSI 12 m 15
Ultra160 SCSI 25 m 1
Ultra160 SCSI 12 m 7
Wide Ultra160 SCSI 25 m 1
Wide Ultra160 SCSI 12 m 15
Ultra320 12 m 15
Ultra320 20 m 1
- MegaRAID 1
- SCSI 320-1 1
- RAID Controller 1
- HARDWARE 1
- FCC Regulatory Statement 3
- Logical Drive Configuration 7
- Physical Device Layout 9
- Contents 13
- Contents xv 15
- Chapter 1 19
- Overview 19
- 1.1 Features 20
- 1.2 SCSI Channel 20
- 1.3 NVRAM and Flash ROM 20
- 1.4 SCSI Connectors 20
- · Single-ended bus 21
- 1.8 Documentation 22
- Documentation 1-5 23
- 1-6 Overview 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 Configuration on Disk 46
- 4.3 Configuration Features 46
- 4.5 RAID Management Features 48
- 4.6 Fault Tolerance Features 48
- 4.7 Software Utilities 49
- 4.9.1 PCI Bridge/CPU 51
- 4.9.2 Cache Memory 51
- 4.9.3 MegaRAID BIOS 51
- 4.9.4 Serial Port 52
- 4.9.5 SCSI Bus 52
- 4.9.6 SCSI Connectors 52
- 4.9.7 SCSI Termination 52
- 4.10 RAID Management 53
- 4.11 Compatibility 54
- 4.11.3 Software 55
- 4-12 Features 56
- Chapter 5 57
- Configuring Physical Drives 57
- Arrays, and Logical Drives 57
- 5.1.4 Physical Device Layout 61
- 5.2 Configuring Arrays 64
- 5.3 Creating Logical Drives 65
- 5.3.2 Assigning RAID Levels 67
- 5.4.1 Optimizing Data Storage 68
- 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
- Installation Steps 6-5 77
- Unjumpered Enabled 77
- Jumpered Disabled 77
- 6.2.4 Step 4: Set Termination 78
- Installation Steps 6-7 79
- 6-8 Hardware Installation 80
- Installation Steps 6-9 81
- 6-10 Hardware Installation 82
- · Tape drive set to SCSI ID 2 83
- 6-12 Hardware Installation 84
- Installation Steps 6-13 85
- 6.2.7 Step 7: Set Target IDs 86
- 6.2.8 Step 8: Power Up 88
- · Novell NetWare 5.1, 6.0 89
- · Red Hat Linux 7.2, 7.3 89
- 6.3 Summary 90
- Chapter 7 91
- Troubleshooting 91
- Firmware Initializing 92
- 7.2 BIOS Boot Error Messages 93
- 7.3 Other BIOS Error Messages 94
- 7.4 Other Potential Problems 95
- Appendix A 97
- SCSI Cables and 97
- Connectors 97
- SCSI devices is shown below 99
- Table A.1 SCSI Cable Vendors 102
- Appendix B 107
- Audible Warnings 107
- B-2 Audible Warnings 108
- Glossary 109
- Appendix C 109
- C-2 Glossary 110
- C-4 Glossary 112
- C-6 Glossary 114
- C-8 Glossary 116
- C-10 Glossary 118
- IX-2 Index 120
- Index IX-3 121
- IX-4 Index 122
- Customer Feedback 123
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