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Appendix C: Multipathing on Linux
The appendix covers the following topics:
• Before You Begin (below)
• Task 1: Meeting Package Requirements (page 394)
• Task 2: Preparing the Configuration File (page 398)
• Task 3: Making Initial Host Settings (page 400)
• Task 4: Create and Configure Devices (page 402)
• Task 5: Setting-up ALUA (page 403)
• RPM Packages and Documents for Linux MPIO (page 405)
• Linux MPIO: Known Issues (page 406)
• Sample multipath.conf File (page 407)
Promise has fully tested VTrak Multipathing on RedHat RHEL 5, 5.1, 5.2, 5.3,
and 5.4; and SuSE SLES 10, 10 SP1, 10 SP2, 10 SP3, and 11. Coverage in this
Guide is limited to those OSes.
Multipathing is possible on other Linux OSes, in some cases with certain
limitations, kernel updates, or different versions of the device mapper or multipath
tool. Promise has not tested all of the possible combinations and therefore does
not attempt to cover them here.
Before You Begin
Before you can set up multipathing on your Linux Host PC, you must:
• Install your Fibre Channel or SAS HBA card and drivers into the Host PC.
• Set up your VTrak, install your disk drives, and create your logical drives.
• Attach your Fibre Channel or SAS cables from the HBA card to the VTrak.
• Install RHEL 5.x with the “linux mpath” Option.
Refer to the Linux Administration Manual, your HBA documentation, and the
VTrak Quick Start Guide or Product Manual as needed for more information.
Check Initial Setup
To check your initial setup, verify that you can view the logical drives on your
VTrak from your Linux desktop or terminal window. Refer to the Linux
Administration Manual for the procedure on your system.
• If you can see the logical drives, your system is properly configured. Go to
“Task 1: Meeting Package Requirements” on page 394.
• If you cannot see the logical drives, make the necessary adjustments and
check again.
- 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
- Expansion 42
- SAS DAS 45
- SAS Cascaded Storage 47
- SAS with JBOD Expansion 50
- Data Path 51
- Management Path 51
- 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 155
- Making UPS Settings 156
- Viewing UPS Information 157
- Managing Disk Arrays 158
- Deleting a Disk Array 163
- Making Disk Array Settings 164
- Creating a Logical Drive 165
- Deleting a Logical Drive 166
- Migrating a Disk Array 166
- Rebuilding a Disk Array 167
- Rebuilding Manually 168
- Running PDM on a Disk Array 169
- Transitioning a Disk Array 169
- Managing Logical Drives 171
- Making Logical Drive Settings 173
- Initializing a Logical Drive 174
- Running Redundancy Check 174
- Table Definitions 176
- LUN Mapping Parameters 177
- Managing Spare Drives 178
- Creating a Spare Drive 179
- Deleting Spare Drive 180
- Making Spare Drive Settings 180
- Running Spare Check 181
- 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 205
- 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
- Media Patrol 319
- 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 357
- With a Hot Spare Drive 357
- Without a Hot Spare Drive 358
- Rebuild Operation 358
- Incomplete Array 360
- Physical Drive Problems 361
- Enclosure Problems 363
- Serial Connection 367
- Telnet Connection 368
- Connection Problems 369
- Fibre Channel Connections 370
- SAS Connections 371
- Chapter 9: Support 375
- Contacting Technical Support 377
- The Netherlands 378
- Attn: Technical Support 379
- Limited Warranty 380
- Your Responsibilities 381
- SNMP MIB Files 385
- Adding a Second Controller 385
- Before You Begin 389
- Installing PerfectPath 390
- Verifying Installation 391
- Running Perfect Path View 393
- Viewing LUN Properties 394
- Viewing Path Properties 396
- Viewing Events 399
- Clearing Path Statistics 399
- Features and Settings 400
- Load Balance Policy 401
- Path Verification 402
- PDO Removal 403
- Performance Tab Refresh Rate 404
- Round Robin Count 404
- Refreshing the Objects 405
- Viewing System Information 405
- Saving System Information 406
- Troubleshooting 407
- Updating PerfectPath 408
- Repairing PerfectPath 409
- Removing PerfectPath 410
- Installing Packages 413
- Verifying Packages – RedHat 413
- Verifying Packages – SuSE 414
- RedHat Systems 416
- SuSE Systems 416
- Editing a Configuration File 416
- Task 5: Setting-up ALUA 421
- SuSE Linux SLES 11 422
- Linux MPIO: Known Issues 424
- Sample multipath.conf File 425
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