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Chapter 8: Technology Background
253
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
1125,6 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
- Warranty and Support 24
- 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 33
- Direct Attached Storage (DAS) 34
- Storage Area Network (SAN) 36
- JBOD Expansion to DAS or SAN 38
- Connecting the Power 40
- Chapter 3: VessRAID Setup 43
- Default IP Addresses 44
- Setting up with the CLI 45
- Setting up with the CLU 47
- Making Automatic IP Settings 48
- Configuring the RAID 48
- Setting up with the LCD 49
- Logging into WebPAM PROe 51
- Selecting a Language 53
- Automatic 54
- Advanced 56
- Logging out of WebPAM PROe 57
- Using the Header 63
- Using Tree View 63
- Using Management View 64
- Viewing the Event Frame 65
- Viewing Other Subsytems 67
- Logging into a Subsystem 67
- Hiding the Other Subsystems 67
- Working with Subsystems 68
- Viewing the Runtime Event Log 69
- Saving the Runtime Event Log 70
- Viewing NVRAM Events 70
- Saving NVRAM Events 71
- Running Background Activities 73
- Running Media Patrol 73
- Viewing Scheduled Activities 74
- Scheduling an Activity 74
- Deleting a Scheduled Activity 75
- Viewing Lock Status 76
- Setting the Lock 76
- Renewing the Lock 76
- Making Your Own User Settings 79
- Changing Your Own Password 80
- Creating a User 81
- Viewing User Sessions 82
- Logging out Other Users 82
- Managing Storage Services 92
- Viewing the LUN Map 93
- Enabling LUN Masking 93
- Adding a LUN Map 93
- Editing a LUN Map 94
- Managing Software Services 95
- Making Netsend Settings 100
- Exporting the User Database 103
- Importing a User Database 103
- Updating the Firmware 105
- Restoring Factory Defaults 106
- Clearing Statistics 106
- Shutting Down the Subsystem 107
- Monitoring the Shutdown 108
- Starting Up After Shutdown 109
- Restarting the Subsystem 110
- Managing the Controller 111
- Viewing Controller Statistics 112
- Making Controller Settings 112
- Clearing an Orphan Watermark 113
- Managing Enclosures 115
- Viewing Enclosure Topology 116
- Viewing Enclosure Information 116
- Making Enclosure Settings 117
- Viewing FRU VPD Information 117
- Checking the Battery 118
- Reconditioning a Battery 119
- Silencing the Buzzer 119
- Making Buzzer Settings 119
- Testing the Buzzer 120
- Managing Physical Drives 121
- Adjustable Items 123
- Locating a Physical Drive 125
- Figure 8. Disk Status LED 126
- Disk Status 126
- Managing UPS Units 127
- Making UPS Settings 128
- Viewing UPS Information 129
- Managing Disk Arrays 130
- Step 1 – Disk Array Creation 133
- Deleting a Disk Array 135
- Making Disk Array Settings 136
- Creating a Logical Drive 137
- Deleting a Logical Drive 138
- Migrating a Disk Array 138
- Rebuilding a Disk Array 139
- Rebuilding Automatically 140
- Rebuilding Manually 140
- Running PDM on a Disk Array 141
- Transitioning a Disk Array 141
- Managing Logical Drives 143
- Logical Drive Status 144
- Logical Drive Synchronization 144
- Making Logical Drive Settings 145
- Initializing a Logical Drive 145
- Running Redundancy Check 146
- Table Definitions 148
- Managing Spare Drives 149
- Creating a Spare Drive 150
- Deleting Spare Drive 151
- Making Spare Drive Settings 151
- Running Spare Check 152
- Initial Connection 156
- Making a Telnet Connection 157
- Logging In 157
- Accessing Online Help 159
- Exiting the CLU 159
- Logging Out of the CLI 159
- Running Quick Setup 160
- Managing the Subsystem 161
- Resetting the Lock 162
- Releasing the Lock 162
- Locating the Controller 164
- Controller Status 165
- Managing the Enclosure 166
- Locating a Power Supply 167
- Viewing Cooling Unit Status 167
- Viewing Voltage Sensor Status 167
- Checking the Batteries 168
- Locating an Enclosure 169
- Setting an Alias 172
- Viewing Advanced Information 172
- Accepting an Incomplete Array 179
- Enabling PDM on a Disk Array 180
- Running PDM 182
- Locating a Disk Array 182
- Deleting a Spare Drive 187
- Setting Read Cache Policy 189
- Locating a Logical Drive 190
- Making Automatic Settings 191
- Making Manual Settings 191
- Making iSCSI Port Settings 192
- Managing iSCSI Connections 193
- Viewing iSCSI Target Ports 194
- Viewing the iSCSI Portal 195
- Viewing iSCSI Sessions 196
- Working with iSCSI iSNS 196
- Working with iSCSI CHAPs 197
- Adding CHAPs 198
- Editing CHAPs 198
- Viewing CHAPs 198
- Using iSCSI Ping 199
- Managing Background Activity 200
- Working with the Event Viewer 202
- Clearing NVRAM Events 203
- Working with LUN Mapping 204
- Mapping a LUN to an Initiator 205
- Deleting an Initiator 205
- Managing Users 209
- Changing a User’s Password 210
- Deleting a User 211
- Making Email Settings 212
- Making SLP Settings 213
- Making Web Server Settings 213
- Making Telnet Settings 214
- Making SNMP Settings 214
- Managing SNMP Trap Sinks 215
- Managing Netsend Recipients 216
- Deleting a Recipient 217
- Netsend Requirements 217
- Flashing through TFTP 218
- Using the LCD Panel 227
- Perusing the Interface 228
- Advanced Mode 229
- Limitations 229
- Viewing Events 229
- Manual IP Settings 230
- Automatic IP Settings 231
- Creating 236
- Verifying 236
- Creating a Disk Array 236
- Disk Array Status 239
- Locating a a Logical Drive 243
- Locating a Spare Drive 245
- Chapter 7: Maintenance 247
- Replacing a Power Supply 252
- Replacing a RAID Controller 253
- Replacing a Cooling Fan 254
- Replacing the Cache Battery 256
- Replacing the Memory Module 258
- Introduction to RAID 261
- RAID 0 – Stripe 262
- RAID 1 – Mirror 263
- RAID 1E – Enhanced Mirror 264
- RAID 10 – Mirror / Stripe 267
- RAID 50 Axles 269
- RAID 60 Axles 271
- Choosing a RAID Level 272
- Choosing Stripe Size 275
- Choosing Sector Size 275
- Cache Policy 276
- Read Cache Policy 277
- Write Cache Policy 277
- Adaptive Writeback Cache 277
- Capacity Coercion 278
- Initialization 278
- Hot Spare Drive(s) 279
- RAID Level Migration 280
- Media Patrol 287
- PDM Triggers 288
- Transition 289
- Automatic Transition 291
- Manual Transition 291
- Chapter 9: Troubleshooting 293
- LEDs Display Amber or Red 294
- Disk Drive LEDs 295
- LCD Panel 296
- Controller LEDs 296
- CLU Reports a Problem 298
- Checking a Reported Component 299
- WebPAM PROe Reports a Problem 300
- LCD Panel Reports a Problem 303
- Viewing a Report from OPAS 303
- Event Notification Response 305
- When a Physical Drive Fails 318
- With a Hot Spare Drive 319
- Without a Hot Spare Drive 319
- Rebuild Operation 320
- Incomplete Array 321
- Physical Drive Problems 322
- Enclosure Problems 324
- Connection Problems 327
- Network Connections 328
- Chapter 10: Support 333
- Contacting Technical Support 335
- Technical Support Services 336
- United States 336
- The Netherlands 336
- Attn: Technical Support 338
- Limited Warranty 339
- Your Responsibilities 340
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