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Chapter 8: Technology Background
241
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
No. of
Drives
No. of
Axles
Drives per
Axle
6 2 3,3 14 2 7,7
7 2 3,4 3 4,5,5
8 2 4,4 4 3,3,4,4
9 2 4,5 15 2 7,8
3 3,3,3 3 5,5,5
10 2 5,5 4 3,4,4,4
3 3,3,4 5 3,3,3,3,3
11 25,6 1628,8
3 3,4,4 3 5,5,6
12 2 6,6 4 4,4,4,4
3 4,4,4 5 3,3,3,3,4
4 3,3,3,3
13 2 6,7
3 4,4,5
4 3,3,3,4
- VessRAID 1
- Copyright 2
- Trademarks 2
- Recommendations 2
- Contents 11
- About This Manual 17
- VessRAID Overview 18
- Architectural Description 19
- Features and Benefits 19
- Operational Features 20
- Management 21
- Specifications 22
- CE Statement 24
- FCC Statement 24
- KCC Statement 24
- Unpacking the VessRAID 25
- Mounting VessRAID in a Rack 29
- Installing Disk Drives 31
- Installing Your Disk Drives 32
- Configuring a Data Path 34
- Configuring a Management Path 34
- Connecting the Power 37
- Chapter 3: VessRAID Setup 41
- Default IP Address 42
- Setting up with the CLI 43
- Setting up with the CLU 44
- Making Automatic IP Settings 45
- Setting up with the LCD 46
- Logging into WebPAM PROe 48
- Choosing a Language 50
- Automatic 51
- Advanced 53
- Logging out of WebPAM PROe 54
- Selecting a Language 59
- Using the Header 61
- Using Tree View 62
- Using Management View 63
- Viewing the Event Frame 63
- Viewing Other Subsytems 65
- Logging into a Subsystem 65
- Hiding the Other Subsystems 65
- Working with Subsystems 66
- Viewing the Runtime Event Log 67
- Saving the Runtime Event Log 68
- Viewing NVRAM Events 68
- Saving NVRAM Events 69
- Running Background Activities 71
- Running Media Patrol 71
- Viewing Scheduled Activities 72
- Scheduling an Activity 72
- Deleting a Scheduled Activity 73
- Viewing Lock Status 74
- Setting the Lock 74
- Renewing the Lock 74
- Making Your Own User Settings 77
- Changing Your Own Password 78
- Creating a User 79
- Viewing User Sessions 80
- Logging out Other Users 80
- Managing Storage Services 84
- Viewing the LUN Map 85
- Enabling LUN Masking 85
- Adding a LUN Map 85
- Editing a LUN Map 86
- Managing Software Services 87
- Adding Trap Sinks 91
- Deleting Trap Sinks 91
- Deleting Netsend Recipients 93
- Changing the Startup Setting 93
- Stopping Netsend service 93
- Exporting the User Database 94
- Importing a User Database 94
- Monitoring the Shutdown 99
- Starting Up After Shutdown 100
- Restarting the Subsystem 101
- Managing the Controller 102
- Viewing Controller Statistics 103
- Making Controller Settings 103
- Clearing an Orphan Watermark 104
- Managing Enclosures 106
- Viewing Enclosure Information 107
- Viewing Enclosure Topology 107
- Making Enclosure Settings 108
- Viewing FRU VPD Information 108
- Checking the Battery 109
- Reconditioning a Battery 110
- Silencing the Buzzer 110
- Making Buzzer Settings 110
- Testing the Buzzer 111
- Managing Physical Drives 112
- Adjustable Items 114
- Clearing Statistics 114
- Locating a Physical Drive 116
- Figure 8. Disk Status LED 117
- Disk Status 117
- Managing UPS Units 118
- Making UPS Settings 119
- Viewing UPS Information 120
- Managing Disk Arrays 121
- Step 1 – Disk Array Creation 124
- Deleting a Disk Array 126
- Making Disk Array Settings 127
- Creating a Logical Drive 128
- Deleting a Logical Drive 129
- Migrating a Disk Array 129
- Rebuilding a Disk Array 130
- Rebuilding Automatically 131
- Rebuilding Manually 131
- Running PDM on a Disk Array 132
- Transitioning a Disk Array 132
- Managing Logical Drives 134
- Logical Drive Status 135
- Logical Drive Synchronization 135
- Making Logical Drive Settings 136
- Initializing a Logical Drive 136
- Running Redundancy Check 137
- Table Definitions 139
- Managing Spare Drives 140
- Creating a Spare Drive 141
- Deleting Spare Drive 142
- Making Spare Drive Settings 142
- Running Spare Check 143
- Initial Connection 146
- Making a Telnet Connection 147
- Logging In 147
- Accessing Online Help 149
- Exiting the CLU 149
- Logging Out of the CLI 149
- Running Quick Setup 150
- Managing the Subsystem 151
- Resetting the Lock 152
- Releasing the Lock 152
- Locating the Controller 154
- Controller Status 155
- Managing the Enclosure 156
- Locating a Power Supply 157
- Viewing Cooling Unit Status 157
- Viewing Voltage Sensor Status 157
- Checking the Batteries 158
- Locating an Enclosure 159
- Setting an Alias 162
- Viewing Advanced Information 162
- Accepting an Incomplete Array 169
- Enabling PDM on a Disk Array 170
- Running PDM 172
- Locating a Disk Array 172
- Deleting a Spare Drive 177
- Setting Read Cache Policy 179
- Locating a Logical Drive 180
- Making Automatic Settings 181
- Making Manual Settings 181
- Managing SAS Connections 182
- Viewing SAS Port Statistics 183
- Viewing SAS Initiators 183
- Adding a SAS Initiator 183
- Managing Background Activity 184
- Working with the Event Viewer 186
- Clearing NVRAM Events 187
- Working with LUN Mapping 188
- Mapping a LUN to an Initiator 189
- Deleting an Initiator 189
- Managing Users 193
- Changing a User’s Password 194
- Deleting a User 195
- Making Email Settings 196
- Making Web Server Settings 197
- Making SLP Settings 197
- Making Telnet Settings 198
- Making SNMP Settings 198
- Managing SNMP Trap Sinks 199
- Making Netsend Settings 200
- Managing Netsend Recipients 200
- Deleting a Recipient 201
- Netsend Requirements 201
- Flashing through TFTP 202
- Restoring Factory Defaults 203
- Shutting Down the Subsystem 204
- Using the LCD Panel 211
- Perusing the Interface 212
- Advanced Mode 213
- Limitations 213
- Viewing Events 213
- Manual IP Settings 214
- Automatic IP Settings 215
- Figure 2. Disk Status LED 221
- Verifying 223
- Creating a Disk Array 223
- Locating a a Disk Array 226
- Locating a a Logical Drive 230
- Locating a Spare Drive 232
- Chapter 7: Maintenance 235
- Updating the Firmware 238
- Replacing a Power Supply 240
- Replacing a RAID Controller 241
- Replacing a Cooling Fan 242
- Replacing the Cache Battery 244
- Replacing the Memory Module 246
- Introduction to RAID 249
- RAID 0 – Stripe 250
- RAID 1 – Mirror 251
- RAID 1E – Enhanced Mirror 252
- RAID 10 – Mirror / Stripe 255
- RAID 50 Axles 257
- RAID 60 Axles 259
- Choosing a RAID Level 260
- Choosing Stripe Size 263
- Choosing Sector Size 263
- Cache Policy 264
- Read Cache Policy 265
- Write Cache Policy 265
- Adaptive Writeback Cache 265
- Capacity Coercion 266
- Initialization 267
- Hot Spare Drive(s) 267
- RAID Level Migration 268
- Media Patrol 275
- PDM Triggers 276
- Transition 277
- Automatic Transition 279
- Manual Transition 279
- Chapter 9: Troubleshooting 281
- LEDs Display Amber or Red 282
- Disk Drive LEDs 283
- LCD Panel 284
- Controller LEDs 284
- CLU Reports a Problem 286
- Checking a Reported Component 287
- WebPAM PROe Reports a Problem 288
- LCD Panel Reports a Problem 291
- Viewing a Report from OPAS 291
- Event Notification Response 293
- When a Physical Drive Fails 306
- With a Hot Spare Drive 307
- Without a Hot Spare Drive 307
- Rebuild Operation 308
- Incomplete Array 309
- Physical Drive Problems 310
- Enclosure Problems 312
- Connection Problems 315
- Network Connections 316
- Chapter 10: Support 319
- Contacting Technical Support 321
- Technical Support Services 322
- United States 322
- The Netherlands 322
- Attn: Technical Support 324
- Limited Warranty 325
- Your Responsibilities 326
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