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Introduction to RAID 35
Disk Spanning
Disk spanning allows multiple physical drives to function like one big drive.
Spanning overcomes lack of disk space and simplifies storage management
by combining existing resources or adding relatively inexpensive resources.
For example, four 20 GB drives can be combined to appear to the operating
system as a single 80 GB drive.
Spanning alone does not provide reliability or performance enhancements.
Spanned logical drives must have the same stripe size and must be
contiguous. In the following graphic, RAID 1 array is turned into a RAID 10
array.
Figure 2-3. Example of Disk Spanning
60 GByte 60 GByte
Can Be Accessed as
One 120 GByte Drive
60 GByte 60 GByte
Can Be Accessed as
One 120 GByte Drive
- PERC 3 User’s Guide 1
- ____________________ 2
- Safety Instructions 3
- When Using Your Computer 4
- Ergonomic Computing Habits 7
- Battery Disposal 7
- Contents 9
- 3 RAID Levels 10
- 4 PERC 3/SC Features 10
- 6 PERC 3/QC Features 12
- 7 Configuring PERC 3 12
- 12 Dell Manager 16
- 13 Troubleshooting 17
- 16 Contents 18
- 18 Figures 20
- PERC 3 Overview 26
- PERC 3 Features 26
- SCSI Channels 27
- SCSI Connectors 27
- Operating System Support 29
- 28 Overview 30
- Introduction to RAID 31
- RAID Definition 32
- Components and Features 33
- Consistency Check 34
- Disk Striping 34
- Stripe Width 35
- Stripe Size 35
- Disk Mirroring 36
- Disk Spanning 37
- Hot Spares 39
- Disk Rebuilds 40
- Hot Swap 41
- SCSI Drive States 41
- Logical Drive States 42
- Enclosure Management 42
- RAID Levels 43
- Selecting a RAID Level 44
- 44 RAID Levels 46
- Figure 3-1. RAID 0 Array 46
- 46 RAID Levels 48
- Figure 3-2. RAID 1 Array 48
- 48 RAID Levels 50
- Figure 3-3. RAID 5 Array 50
- 50 RAID Levels 52
- Figure 3-4. RAID 10 Array 52
- 52 RAID Levels 54
- Figure 3-5. RAID 50 Array 54
- PERC 3/SC Features 55
- Hardware Requirements 56
- Configuration Features 56
- SMART Technology 57
- Array Performance Features 58
- Software Utilities 59
- PERC 3/SC Specifications 60
- PCI Bridge/CPU 61
- Cache Memory 61
- 60 PERC 3/SC Features 62
- SCSI Firmware 63
- RAID Management 63
- PERC 3/DC and PERC 65
- 3/DCL Features 65
- Configuration on Disk 67
- Fault Tolerance Features 69
- PERC 3/DC and PERC 3/DCL 70
- Specifications 70
- PERC 3/DC and PERC 3/DCL BIOS 72
- Onboard Speaker 72
- Serial Port 72
- SCSI Bus 72
- PERC 3/QC Features 75
- PERC 3/QC Specifications 80
- 80 PERC 3/QC Features 82
- Configuring PERC 3 85
- Current Configuration 86
- Channel 1 87
- Channel 2 88
- Logical Drive Configuration 89
- Physical Device Layout 91
- Configuring Arrays 94
- Configuration Strategies 95
- Maximizing Capacity 96
- Assigning RAID Levels 97
- Configuring Logical Drives 98
- Optimizing Data Storage 98
- Array Functions 99
- Random Array Deletion 101
- Configuration Module 102
- PERC 3/SC Hardware 103
- Installation 103
- Requirements 104
- Installation Steps 105
- PERC 3/SC Card Layout 105
- Step 1—Unpack 106
- Step 2—Power Down 106
- Step 3—Set Jumpers 107
- J9 I2C Interface Connector 108
- J5 Serial Port 108
- J8 Hard Disk LED 109
- J10 Term Power 109
- Step 4—Set SCSI Termination 110
- SCSI Termination 111
- Selecting a Terminator 111
- Step 5—Install PERC 3/SC 113
- Motherboard 114
- Step 6—Connect SCSI Cables 115
- Step 7—Set Target IDs 116
- Step 8—Power On Host System 117
- PERC 3/DC or PERC 119
- 3/DCL Hardware 119
- PERC 3/DC Card Layout 121
- PERC 3/DCL Card Layout 122
- J2, and J3 Termination Enable 124
- J9 Onboard BIOS Enable 124
- J10 NVRAM Clear 125
- J11 Serial Port 125
- J13 Dirty Cache LED 125
- J14 SCSI Activity LED 126
- J16 and J18 TERMPWR Enable 126
- PERC 3/DC and 3/DCL 128
- Step 7—Connect SCSI Cables 130
- Connect SCSI Devices 131
- Cable Suggestions 131
- PERC 3/QC Hardware 135
- PERC 3/QC Card Layout 137
- J14 Serial Port 141
- J17 Dirty Cache LED 141
- J19 Onboard BIOS Enable 141
- Figure 10-4 144
- Step 5—Install PERC 3/QC 145
- Step 8—Power on Host System 148
- WebBIOS Configuration Utility 149
- PERC 3 BIOS 151
- Configuration Utility 151
- Configuration On Disk 152
- Starting the PERC 3 BIOS 152
- Options 153
- Configure Menu 154
- Initialize Menu 155
- Objects Menu 155
- (continued) 156
- Logical Drive 157
- Virtual Sizing 157
- Physical Drive 158
- Battery Information 159
- Format Menu 160
- Rebuild Menu 160
- Check Consistency Menu 161
- Easy Configuration 162
- New Configuration 162
- View/Add Configuration 163
- Press <F4> 164
- Using Easy Configuration 165
- Using New Configuration 169
- Using View/Add Configuration 175
- 18 Set the Read Policy 179
- 19 Set the Read Policy 179
- Initializing Logical Drives 180
- Deletion) 181
- Formatting Physical Drives 182
- Batch Formatting 183
- Individual Formatting 183
- Rebuilding Failed Disk Drives 184
- Exiting the PERC 3 BIOS 186
- Setting Hardware Termination 186
- Clustering 187
- Dell Manager 189
- Starting Dell Manager 190
- Management Menu Options 191
- Dell Manager Menu Options 192
- Logical Drive Settings 193
- Physical Drive Menu 194
- 12-8 displays the menu items 195
- Reconstruct Menu 197
- Parameters 198
- Formatting Drives 202
- Exiting Dell Manager 204
- Troubleshooting 205
- Overview 206
- BIOS Boot Error Messages 207
- Other BIOS Error Messages 210
- Other Potential Problems 211
- Audible Warnings 212
- Appendix A: SCSI 213
- Cables and Connectors 213
- Appendix B: 215
- Warranties and Return 215
- General Provisions 221
- Guarantee 237
- Exclusions 237
- Making a Claim 237
- Glossary 239
- 238 Glossary 240
- Glossary 239 241
- 240 Glossary 242
- Glossary 241 243
- 242 Glossary 244
- Glossary 243 245
- 244 Glossary 246
- Glossary 245 247
- 246 Glossary 248
- Index 247 249
- 248 Index 250
- 249 Index 251
- 250 Index 252
- Printed in the U.S.A 254
- P/N 5C229 Rev. A04 254
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