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Chapter 7: Technology Background
281
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 32 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
- E610f, E610s, E310f, E310s 1
- Copyright 2
- Trademarks 2
- Recommendations 2
- VTrak E-Class Product Manual 10
- Contents 11
- About This Manual 19
- VTrak Overview 20
- Architectural Description 22
- Features and Benefits 23
- Operational Features 24
- Management 25
- Specifications 26
- Warranty and Support 27
- BSMI Statement 27
- CE Statement 27
- FCC Statement 27
- GOST-R Statement 28
- IRAM Statement 28
- KCC Statement 28
- Chapter 2: VTrak Installation 29
- Mounting VTrak in a Rack 30
- Installing Disk Drives 33
- AAMUX Adapter 34
- WARNING: 35
- Counter-sink screws only 35
- Fibre Channel SAN 37
- Fibre Channel DAS 39
- FC 1 FC 2 41
- Expansion 42
- Data Path 45
- Management Path 45
- SAS Cascaded Storage 47
- SAS with JBOD Expansion 50
- Connecting the Power 55
- Chapter 3: VTrak Setup 57
- VTrak Default IP Addresses 58
- Setting up VTrak with the CLI 59
- Setting up VTrak with the CLU 61
- Manual IP settings 62
- Automatic IP settings 62
- Setting Up WebPAM PROe 64
- Choosing a Language 65
- Creating a Disk Array 66
- Automatic 67
- Advanced 68
- Logging out of WebPAM PROe 70
- Logging into WebPAM PROe 72
- Perusing the Interface 75
- Using the Header 76
- Using Tree View 76
- Using Management View 77
- Viewing the Event Frame 78
- Viewing Other Subsytems 80
- Logging into a Subsystem 80
- Hiding the Other Subsystems 80
- Working with Subsystems 81
- Viewing Subsystem Information 82
- Viewing the Runtime Event Log 84
- Saving the Runtime Event Log 85
- Viewing NVRAM Events 86
- Saving NVRAM Events 87
- Running Background Activities 89
- Viewing Scheduled Activities 90
- Scheduling an Activity 90
- Deleting a Scheduled Activity 91
- Viewing Lock Status 91
- Setting the Lock 92
- Renewing the Lock 92
- Releasing the Lock 92
- Setting-up Event Notification 95
- Viewing User Sessions 98
- Logging out Other Users 99
- Port Setting Information 103
- Property Definitions 104
- Viewing SFP Information 105
- Adding an Initiator 107
- Managing SAS Connections 108
- Viewing SAS Port Statistics 109
- Viewing SAS Initiators 109
- Managing Storage Services 111
- Deleting an Initiator 112
- Viewing the LUN Map 112
- Enabling LUN Masking 112
- Adding a LUN Map 112
- Editing a LUN Map 113
- Monitoring Performance 114
- Managing Software Services 116
- Making SLP Settings 117
- Making Web Server Settings 118
- Making Telnet Settings 119
- Making SSH Settings 120
- Making SNMP Settings 120
- Managing SNMP Trap Sinks 121
- Making CIM Settings 122
- Making Netsend Settings 123
- Managing Netsend Recipients 124
- Deleting Netsend Recipients 125
- Exporting the User Database 126
- Importing a User Database 128
- Updating the Firmware 130
- Restoring Factory Defaults 132
- Clearing Statistics 133
- Shutting Down the Subsystem 135
- Starting Up After Shutdown 136
- Restarting the Subsystem 137
- Managing Controllers 138
- Adjustable items 139
- Viewing Controller Statistics 140
- Making Controller Settings 140
- Clearing an Orphan Watermark 142
- Managing Enclosures 143
- Viewing Enclosure Topology 144
- Viewing Enclosure Information 144
- Making Enclosure Settings 145
- Viewing FRU VPD Information 145
- Checking the Batteries 146
- Reconditioning a Battery 146
- Silencing the Buzzer 147
- Making Buzzer Settings 147
- Testing the Buzzer 148
- Managing Physical Drives 149
- Adjustable Items 151
- Managing UPS Units 154
- Making UPS Settings 155
- Viewing UPS Information 156
- Managing Disk Arrays 157
- Deleting a Disk Array 162
- Making Disk Array Settings 163
- Creating a Logical Drive 163
- Deleting a Logical Drive 165
- Migrating a Disk Array 165
- Rebuilding a Disk Array 166
- Rebuilding Manually 167
- Running PDM on a Disk Array 168
- Transitioning a Disk Array 168
- Managing Logical Drives 170
- Making Logical Drive Settings 172
- Initializing a Logical Drive 173
- Running Redundancy Check 173
- Table Definitions 175
- LUN Mapping Parameters 176
- Managing Spare Drives 177
- Creating a Spare Drive 178
- Deleting Spare Drive 179
- Making Spare Drive Settings 179
- Running Spare Check 180
- Initial Connection 184
- Making a Telnet Connection 185
- Making a SSH Connection 185
- Logging In 186
- Accessing Online Help 187
- Exiting the CLU 187
- Logging Out of the CLI 188
- Running Quick Setup 189
- Managing the Subsystem 190
- Running Media Patrol 191
- Making NTP Settings 192
- Managing the Controllers 194
- Locating the Controller 196
- Managing the Enclosure 197
- Viewing Power Supply Status 198
- Locating a Power Supply 199
- Viewing Cooling Unit Status 199
- Viewing Voltage Sensor Status 200
- Locating an Enclosure 201
- Setting an Alias 204
- Locating a Physical Drive 206
- Disk Array Operational Status 212
- Accepting an Incomplete Array 213
- Running PDM 215
- Locating a Disk Array 216
- Deleting a Spare Drive 221
- Locating a Logical Drive 225
- Making Automatic Settings 226
- Making Manual Settings 226
- Viewing Node Information 228
- Adding a SAS Initiator 233
- Managing Background Activity 234
- Working with the Event Viewer 236
- Clearing NVRAM Events 237
- Working with LUN Mapping 238
- Mapping a LUN to an Initiator 239
- Managing Users 243
- Changing Your Own Password 245
- Deleting a User 246
- Making Email Settings 247
- Making Webserver Settings 248
- Flashing through TFTP 255
- Chapter 6: Maintenance 267
- Replacing a Power Supply 277
- Replacing a Cache Battery 283
- Removing the old controller 287
- Installing the new controller 287
- Introduction to RAID 291
- RAID 0 – Stripe 292
- RAID 1 – Mirror 293
- RAID 1E – Enhanced Mirror 294
- RAID 10 – Mirror + Stripe 297
- RAID 50 Axles 299
- RAID 60 Axles 301
- Choosing a RAID Level 302
- Choosing Stripe Size 305
- Choosing Sector Size 305
- Cache Policy 306
- Read Cache Policy 307
- Write Cache Policy 307
- Adaptive Writeback Cache 307
- Cache Mirroring 308
- LUN Affinity 309
- Logical Drive Settings 310
- Failover and Failback 310
- Capacity Coercion 311
- Initialization 311
- Hot Spare Drive(s) 312
- RAID Level Migration 312
- Figure 1 318
- PDM Triggers 320
- Transition 321
- Automatic Transition 323
- Manual Transition 323
- Chapter 8: Troubleshooting 325
- LEDs Display Amber or Red 327
- Drive Status Indicators 328
- Back of Enclosure 328
- CLU Reports a Problem 333
- Checking a Reported Component 334
- WebPAM PROe Reports a Problem 336
- Figure 13.The Event Log 337
- Event Notification Response 339
- When a Physical Drive Fails 354
- With a Hot Spare Drive 354
- Without a Hot Spare Drive 355
- Rebuild Operation 355
- Incomplete Array 357
- Physical Drive Problems 358
- Enclosure Problems 360
- Serial Connection 364
- Telnet Connection 365
- Connection Problems 366
- Fibre Channel Connections 367
- SAS Connections 368
- Chapter 9: Support 371
- Contacting Technical Support 373
- The Netherlands 374
- Attn: Technical Support 375
- Limited Warranty 376
- Your Responsibilities 377
- SNMP MIB Files 381
- Adding a Second Controller 381
- Before You Begin 385
- Installing PerfectPath 386
- Verifying Installation 387
- Running Perfect Path View 389
- Viewing LUN Properties 390
- Viewing Path Properties 392
- Clearing Path Statistics 394
- Features and Settings 395
- Load Balance Policy 396
- Path Verification 397
- PDO Removal 398
- Performance Tab Refresh Rate 399
- Round Robin Count 399
- Refreshing the Objects 400
- Viewing System Information 400
- Saving System Information 401
- Troubleshooting 402
- Updating PerfectPath 403
- Repairing PerfectPath 404
- Removing PerfectPath 405
- Installing Packages 409
- Verifying Packages – RedHat 409
- Verifying Packages – SuSE 410
- RedHat Systems 412
- SuSE Systems 412
- Editing a Configuration File 412
- 10 SP3, and 11 414
- (or a similar message) 419
- Sample multipath.conf File 420
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