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Chapter 7: Technology Background
233
RAID 10 – Mirror / Stripe
Mirror/Stripe combines both of the RAID 0 and RAID 1 logical drive types. RAID
10 is similar though not identical to RAID 0+1. It can increase performance by
reading and writing data in parallel while protecting data with duplication. The
data on one drive pair is mirrored together, then striped over a second drive pair.
Figure 6. RAID 10 takes a data mirror on one drive pair and stripes it over a
second drive pair
The data capacity RAID 10 logical drive equals the capacity of the smallest
physical drive times the number of physical drives, divided by two.
In some cases, RAID 10 offers double fault tolerance, depending on which
physical drives fail.
RAID 10 arrays require an even number of physical drives and a minimum of
four.
For RAID 10 characteristics with an odd number of physical drives, use RAID 1E.
See page 230.
Data Stripe
Data
Mirror
Physical Drives
- EX4650, EX8650 1
- EX8654, EX8658 1
- Copyright 2
- Trademarks 2
- Recommendations 2
- Contents 11
- Chapter 1: Introduction 15
- Product Overview 16
- Operating System Support 17
- Browser Support 18
- Key Features and Benefits 18
- Specifications 20
- Chapter 2: Installation 21
- Installing the SuperTrak Card 23
- Scenario 5: SAS Expanders 30
- Choosing the Physical Drives 31
- Installing the CLI 37
- Installing onto Linux 43
- Installing WebPAM PRO 52
- Internet Browser 53
- Setting up WebPAM PRO 74
- Chapter 3: Installing Drivers 77
- Driver Installation Media 78
- Linux and FreeBSD 79
- Windows Server 2008 80
- Existing System 81
- Windows Vista 82
- Windows Server 2003 84
- Windows XP 86
- New OS Installation 88
- Fedora Core 6 89
- Fedora Core 7, 8 90
- SLES 10, 10 SP1, 10 SP2 92
- Miracle Linux 4 93
- FreeBSD 6.1, 6.2, 6.3, 7.0 94
- SuperTrak BIOS 99
- Accessing the Main Menu 102
- Selecting a Controller 103
- Managing Physical Drives 104
- Managing Disk Arrays 106
- Creating a Disk Array 107
- Deleting a Disk Array 108
- Changing Disk Array Settings 108
- Rebuilding a Disk Array 108
- Managing Logical Drives 109
- Creating a Logical Drive 110
- Initializing a Logical Drive 111
- Deleting a Logical Drive 112
- Managing Spare Drives 113
- Changing Spare Drive Settings 114
- Deleting a Spare Drive 115
- Viewing Background Activity 116
- Managing the Event Log 117
- Clearing the Event Logs 118
- Working with Time Sync 119
- Using the Miscellaneous Menu 120
- Logging into WebPAM PRO 123
- Logging in over the Network 124
- Login Screen 125
- Accessing the Interface 126
- Using the Header 127
- Using Tree View 127
- Using Management View 128
- Choosing a Display Language 129
- Viewing the Event Frame 129
- Saving the Event Frame 130
- Deleting the Event Frame 130
- Viewing the Storage Network 130
- Logging out of WebPAM PRO 131
- Managing Users 132
- Making Your Own User Settings 133
- Changing a User’s Password 133
- Changing Your Own Password 133
- Creating a User 134
- Deleting a User 134
- 6. Click the Submit button 135
- Adding a Subsystem or Host 136
- In-Band versus Out-of-Band 137
- Deleting a Subsystem or Host 137
- Setting User Privilege 138
- Managing Software Services 140
- Restarting the Tomcat Server 141
- Setting up Email Service 141
- Setting up Extended SMTP 142
- Sending A Test Email Message 142
- Changing CIM Client Settings 143
- Changing CIM Server Settings 143
- Managing the Host 144
- Managing the Subsystem 145
- Clearing Statistical Data 146
- Updating the Firmware 146
- Checking Subsystem Health 147
- Viewing the Runtime Event Log 148
- Saving the Runtime Event Log 148
- Viewing the NVRAM Event Log 149
- Saving the NVRAM Event Log 150
- Clearing the NVRAM Event Log 150
- Running Background Activities 152
- Running Media Patrol 152
- Running PDM 152
- Viewing Scheduled Activities 153
- Scheduling an Activity 153
- Deleting a Scheduled Activity 155
- Viewing System Configuration 155
- Managing the Controller 156
- Viewing Controller Statistics 158
- Making Controller Settings 158
- Clearing an Orphan Watermark 159
- Viewing Battery Information 159
- Silencing the Buzzer 160
- Making Buzzer Settings 160
- Testing the Buzzer 160
- Viewing Buzzer Information 161
- Managing Enclosures 162
- Promise Enclosures 164
- Adjustable Items 165
- Viewing the SMART Log 167
- Making SMART Log Settings 169
- Making Disk Array Settings 178
- Migrating a Disk Array 181
- Running PDM on a Disk Array 183
- Transitioning a Disk Array 184
- Locating a Logical Drive 187
- Logical Drive Status 188
- Logical Drive Synchronization 188
- Running Redundancy Check 190
- Creating a Spare Drive 193
- Deleting Spare Drive 194
- Making Spare Drive Settings 194
- Running Spare Check 195
- Opening the CLI on Windows 199
- To open the CLI: 200
- 1. Open a terminal window 200
- Table of Supported Commands 201
- Notes and Conventions 203
- List of Supported Commands 204
- Examples 208
- Options 226
- Introduction to RAID 241
- RAID 0 – Stripe 242
- RAID 1 – Mirror 243
- RAID 1E – Enhanced Mirror 244
- RAID 10 – Mirror / Stripe 247
- RAID 50 Axles 249
- RAID 60 Axles 252
- Choosing a RAID Level 254
- Choosing Stripe Block Size 258
- Choosing Sector Size 258
- Choosing Cache Policy 259
- Capacity Coercion 260
- Initialization 261
- Hot Spare Drive 262
- RAID Level Migration 262
- Delete and Recreate 268
- Media Patrol 269
- Transition 270
- Automatic Transition 272
- Manual Transition 272
- Chapter 8: Troubleshooting 275
- Global LED Display 276
- Direct LED Display 276
- Opening WebPAM PRO 279
- What to Look For 279
- Salvaging Physical Drives 283
- Rebuilding with WebPAM PRO 284
- Rebuilding with SuperBuild 285
- Cache Battery Does Not Charge 286
- Chapter 9: Support 287
- Drive Issues 288
- Post-Installation 290
- Contacting Technical Support 291
- Attn: Technical Support 293
- Limited Warranty 294
- Your Responsibilities 295
- (below) 302
- Appendix B: Upgrades 303
- Updating WebPAM PRO 304
- Installing the BBU 306
- Schematic Diagrams 309
- LED activity = Low 310
- Aggregate LED Display 311
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