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Chapter 6: Technology Background
163
RAID 50 Axles
When you create a RAID 50, you must specify the number of axles. An axle
refers to a single RAID 5 logical drive that is striped with other RAID 5 logical
drives to make RAID 50. An axle can have from 3 to 16 physical drives,
depending on the number of physical drives in the logical drive.
The chart below shows RAID 50 logical drives with 6 to 16 physical drives, the
available number of axles, and the resulting distribution of physical drives on
each axle.
RAID 50 Logical Drive
No. of Drives No. of Axles Drives per Axle
623,3
723,4
824,4
924,5
33,3,3
10 2 5,5
33,3,4
11 2 5,6
33,4,4
12 2 6,6
34,4,4
4 3,3,3,3
13 2 6,7
34,4,5
4 3,3,3,4
14 2 7,7
34,5,5
4 3,3,4,4
- EX4650, EX8650 1
- EX8654, EX8658 1
- Copyright 2
- Trademarks 2
- Recommendations 2
- Contents 11
- Chapter 1: Introduction 13
- Product Overview 14
- Operating System Support 15
- Browser Support 15
- Key Features and Benefits 16
- Specifications 18
- Chapter 2: Installation 19
- Installing the SuperTrak Card 20
- Scenario 5: SAS Expanders 25
- Choosing the Physical Drives 26
- Installing WebPAM PRO 32
- Internet Browser 33
- Logging into WebPAM PRO 49
- Login Screen 50
- Setting up WebPAM PRO 51
- Chapter 3: Installing Drivers 53
- Driver Diskette for Windows 54
- USB Memory Stick for Windows 54
- Driver Diskette for Linux 54
- Windows Vista 55
- Existing System 56
- Windows Server 2003 57
- Windows XP 59
- Windows 2000 61
- New OS Installation 63
- SuSE Linux Enterprise 10.1 64
- SuperTrak BIOS 65
- Main Menu 68
- Controller Selection 69
- Controller Information 70
- Physical Drive Management 71
- Disk Array Management 73
- Changing Disk Array Settings 75
- Logical Drive Management 76
- Rebuilding the Logical Drive 81
- RAID 1, 5, 6, 10, 50 and 60 83
- Spare Drive Management 85
- Changing Spare Drive Settings 86
- Deleting a Spare Drive 87
- Background Activity 88
- Event Log 89
- Clearing the Event Logs 90
- Time Sync 91
- Miscellaneous 92
- Logging in over the Network 96
- Accessing the Interface 98
- Using the Header 99
- Using Tree View 99
- Using Management View 100
- Choosing a Display Language 101
- Viewing the Event Frame 101
- Saving the Event Frame 102
- Deleting the Event Frame 102
- Viewing the Storage Network 102
- Logging out of WebPAM PRO 103
- Managing Users 104
- Making Your Own User Settings 105
- Changing a User’s Password 105
- Changing Your Own Password 105
- Creating a User 106
- Deleting a User 106
- Adding a Subsystem or Host 108
- Deleting a Subsystem or Host 109
- Setting User Privilege 109
- Managing Software Services 111
- Restarting the Tomcat Server 112
- Setting up Email Service 112
- Setting up Extended SMTP 113
- Sending A Test Email Message 113
- Changing CIM Client Settings 114
- Changing CIM Server Settings 114
- Managing the Host 115
- Managing the Subsystem 116
- Clearing Statistical Data 117
- Updating the Firmware 117
- Checking Subsystem Health 118
- Viewing the Runtime Event Log 118
- Saving the Runtime Event Log 119
- Viewing the NVRAM Event Log 119
- Saving the NVRAM Event Log 120
- Clearing the NVRAM Event Log 120
- Running Background Activities 122
- Running Media Patrol 122
- Running PDM 123
- Viewing Scheduled Activities 123
- Scheduling an Activity 123
- Deleting a Scheduled Activity 125
- Viewing System Configuration 125
- Managing the Controller 127
- Viewing Controller Statistics 129
- Making Controller Settings 129
- Clearing an Orphan Watermark 130
- Viewing Battery Information 130
- Silencing the Buzzer 131
- Making Buzzer Settings 131
- Testing the Buzzer 131
- Viewing Buzzer Information 132
- Managing Enclosures 133
- Managing Physical Drives 134
- Promise Enclosures 135
- Adjustable Items 136
- Managing Disk Arrays 139
- Creating a Disk Array 140
- Deleting a Disk Array 146
- Making Disk Array Settings 147
- Creating a Logical Drive 148
- Deleting a Logical Drive 149
- Migrating a Disk Array 150
- Rebuilding a Disk Array 151
- Running PDM on a Disk Array 152
- Transitioning a Disk Array 153
- Managing Logical Drives 155
- Locating a Logical Drive 156
- Logical Drive Status 157
- Logical Drive Synchronization 157
- Initializing a Logical Drive 158
- Running Redundancy Check 159
- Managing Spare Drives 161
- Creating a Spare Drive 162
- Deleting Spare Drive 163
- Making Spare Drive Settings 163
- Running Spare Check 164
- Introduction to RAID 167
- RAID 0 – Stripe 168
- RAID 1 – Mirror 169
- RAID 1E – Enhanced Mirror 170
- RAID 10 – Mirror / Stripe 173
- RAID 50 Axles 175
- RAID 60 Axles 178
- Choosing a RAID Level 180
- Choosing Stripe Block Size 184
- Choosing Sector Size 184
- Choosing Cache Policy 185
- Capacity Coercion 186
- Initialization 187
- Hot Spare Drive(s) 187
- RAID Level Migration 188
- Delete and Recreate 195
- Media Patrol 196
- Transition 197
- Automatic Transition 199
- Manual Transition 199
- When a Physical Drive Fails 201
- With a Hot Spare Drive 203
- Without a Hot Spare Drive 203
- Rebuild Operation 203
- After a successful rebuild: 204
- • The alarm is silent 204
- Chapter 7: Support 205
- Drive Issues 206
- Post-Installation 208
- Contacting Technical Support 209
- The Netherlands 210
- Limited Warranty 211
- Your Responsibilities 213
- (below) 218
- Appendix B: Upgrades 219
- Updating WebPAM PRO 220
- Installing the BBU 222
- Aggregate 225
- LED activity = Low 225
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