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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 387)
• Task 2: Preparing the Configuration File (page 390)
• Task 3: Making Initial Host Settings (page 392)
• Task 4: Create and Configure Devices (page 394)
• Task 5: Setting-up ALUA (page 395)
• RPM Packages and Documents for Linux MPIO (page 400)
• Linux MPIO: Known Issues (page 402)
• Sample multipath.conf File (page 403)
PROMISE has fully tested VTrak multipathing on RedHat RHEL 5.3, 5.4, and 5.5;
and SuSE SLES 10 SP2, 10 SP3, 11, and 11 SP1. Coverage in this Product
Manual is limited to those OSes.
Multipathing is possible on other Linux OSes. PROMISE has not tested every
possible combination and therefore does not attempt to cover them here.
For a list of supported OSes, download the latest compatibility list from
PROMISE support: http://www.promise.com/support/.
Before You Begin
Before you can set up multipathing on your Linux Host PC, you must:
• Install your Fibre Channel or SAS HBA card into the Host PC.
• Install the HBA card drivers onto the Host PC
• Setup your VTrak, install your physical drives and create your logical drives.
• Attach your Fibre Channel or SAS cables from the HBA card to the VTrak
RAID subsystem.
• Install RHEL 5.x with the linux mpath option.
• For ALUA, refer to the PROMISE Linux support packages. See page 400.
Refer to the Linux Administration Manual, your HBA documentation, and this
Appendix as needed for more information.
- E830f, E630f, E330f 1
- Copyright 2
- Recommendations 2
- VTrak E-Class Product Manual 10
- Contents 11
- Chapter 1: Introduction 23
- VTrak Overview 24
- Architectural Description 25
- Features 28
- Maximum LUNs Supported 29
- Advanced Storage Features 29
- Background Activities 29
- PerfectRAID Features 29
- System Management 30
- General Specifications 31
- Dimensions 32
- Safety and Environmental 33
- Warranty and Support 34
- Chapter 2: Installation 35
- Mounting VTrak in a Rack 36
- Attaching the Sliding Plates 39
- Installing Physical Drives 41
- Installing Your Drives 42
- Fibre Channel SAN 45
- Data Path 46
- Management Path 46
- Fibre Channel DAS 47
- Host PC or Server 48
- Network Switch 48
- SAS IN SAS OUT 49
- JBOD Expansion 50
- Chapter 3: Setup 55
- Drive Status Indicators 57
- VTrak Default IP Addresses 59
- Setting up VTrak with the CLI 59
- Setting up VTrak with the CLU 61
- Setting system date and time 62
- Logging into WebPAM PROe 64
- Automatic 67
- Advanced 69
- Logging out of WebPAM PROe 71
- Secure Connection 74
- Choosing the Display Language 75
- 4. Click the Login button 76
- Perusing the Interface 77
- Viewing the Storage Network 80
- Managing Subsystems 81
- Making Subsystem Settings 82
- Saving a Service Report 85
- Managing RAID Controllers 91
- Viewing Controller Statistics 93
- Locating a Controller 94
- Managing Enclosures 98
- Viewing Enclosure Information 99
- Viewing FRU VPD Information 100
- Viewing Power Supply Status 100
- Viewing Fan Status 100
- Viewing Voltage Sensor Status 101
- Managing UPS Units 102
- Making UPS Settings 103
- Viewing UPS Information 104
- Managing Users 105
- Making User Settings 107
- Making LDAP Settings 108
- Changing User Passwords 109
- Deleting a User 110
- Importing a User Database 110
- Exporting a User Database 111
- Media Patrol 116
- Redundancy Check 116
- Initialization 117
- Migration 118
- Making Migration Settings 119
- Making PDM Settings 119
- Transition 120
- Synchronization 120
- Battery Reconditioning 121
- Spare Check 121
- Managing Storage Services 122
- SLP Service 123
- Webserver Service 124
- Telnet Service 125
- SSH Service 126
- SNMP Service 127
- Restarting SNMP Service 128
- Making SNMP Settings 128
- Adding an SNMP Trap Sink 128
- CIM Service 129
- Netsend Service 130
- Starting Netsend Service 131
- Stopping Netsend 131
- Restarting Netsend Service 131
- Making Netsend Settings 131
- Monitoring Performance 133
- Monitoring PSU Wattage 134
- Managing Physical Drives 136
- Locating a Physical Drive 141
- Managing Disk Arrays 143
- Wizard: Express Configuration 146
- Deleting a Disk Array 149
- Making Disk Array Settings 150
- Locating a Disk Array 150
- Running PDM on a Disk Array 151
- Rebuilding a Disk Array 152
- Performing a Manual Rebuild 153
- Managing Logical Drives 154
- Deleting a Logical Drive 158
- Making Logical Drive Settings 158
- Locating a Logical Drive 159
- Initializing a Logical Drive 159
- Migrating a Logical Drive 161
- Managing Spare Drives 163
- Deleting a Spare Drive 165
- Making Spare Drive Settings 165
- Locating a Spare Drive 165
- Running Spare Check 166
- Managing LUNs and Initiators 168
- Editing a LUN Map 169
- Deleting a LUN Map 169
- Viewing a List of Initiators 170
- Viewing FC Node Information 171
- Viewing FC Port Information 171
- Making FC Port Settings 172
- Viewing FC Port Statistics 173
- Viewing a List of FC SFPs 173
- Adding an FC Initiator 174
- Deleting an FC Initiator 174
- Managing SAS Connections 175
- Adding a SAS Initiator 176
- Deleting a SAS Initiator 176
- Initial Connection 178
- Making a Telnet Connection 179
- Making a SSH Connection 179
- Logging Into the CLI 180
- Accessing Online Help 181
- Exiting the CLU 181
- Logging Out of the CLI 182
- Running Quick Setup 183
- Managing the Subsystem 184
- Setting the Lock 185
- Resetting the Lock 185
- Releasing the Lock 185
- Making NTP Settings 186
- Managing the Controllers 188
- Making Controller Settings 189
- Locating the Controller 190
- Managing the Enclosure 192
- Making Enclosure Settings 193
- Locating a Power Supply 194
- Viewing Cooling Unit Status 194
- Viewing Battery Information 195
- Reconditioning a Battery 196
- Locating an Enclosure 196
- Viewing Enclosure Topology 196
- Clearing Statistics 199
- Setting an Alias 200
- Disk Array Operational Status 207
- Accepting an Incomplete Array 208
- Disk Array 208
- Migrating a Disk Array 209
- Running PDM 210
- Creating a Logical Drive 212
- Running Redundancy Check 220
- Making Automatic Settings 222
- Making Manual Settings 222
- Viewing Node Information 224
- Viewing SFP Information 225
- Property Definitions 226
- Viewing SAS Port Statistics 229
- Viewing SAS Initiators 229
- Managing Background Activity 230
- Working with the Event Viewer 232
- Clearing NVRAM Events 233
- Working with LUN Mapping 234
- Mapping a LUN to an Initiator 235
- Deleting an Initiator 235
- Changing Your Own Password 241
- Making Email Settings 243
- Making SLP Settings 244
- Making Webserver Settings 244
- Making Telnet Settings 245
- Making SSH Settings 245
- Managing SNMP Trap Sinks 246
- Making CIM Settings 247
- Managing Netsend Recipients 249
- Deleting Netsend Recipients 250
- Flashing through TFTP 251
- Restoring Factory Defaults 254
- Shutting Down the Subsystem 255
- Starting Up After Shutdown 257
- Restarting the Subsystem 259
- Making Buzzer Settings 261
- Chapter 6: Maintenance 263
- Automatic Restart 264
- Manual Restart 264
- Updating with the CLU 266
- Updating with USB Support 268
- Failed Update 269
- WebPAM PROe 270
- Restarting a Subsystem 271
- Replacing a Power Supply 272
- Removing the Old Power Supply 273
- Installing a New Power Supply 273
- E830f and E630f 274
- Removing the Old Controller 276
- Installing the New Controller 277
- Disk Arrays 281
- Power Management 282
- Logical Drives 283
- RAID 1 – Mirror 285
- RAID 1E – Enhanced Mirror 287
- RAID 10 – Mirror + Stripe 290
- RAID 50 Axles 292
- • Transaction processing 294
- RAID 60 Axles 295
- RAID Level Migration 297
- Stripe Size 303
- Sector Size 303
- Preferred Controller ID 303
- Partition and Format 304
- Spare Drives 305
- Automatic Transition 309
- Manual Transition 309
- RAID Controllers 311
- Forced Read-Ahead Cache 312
- Adaptive Writeback Cache 312
- Power Saving 313
- Capacity Coercion 313
- Chapter 8: Troubleshooting 315
- Silencing the Buzzer 316
- LEDs Display Amber or Red 317
- Drive Carrier LEDs 318
- Back Panel LEDs 319
- CLU Reports a Problem 322
- Checking a Reported Component 323
- WebPAM PROe Reports a Problem 325
- •Storage Tab 327
- • Disk Arrays 327
- • Logical Drives 327
- USB Support Reports a Problem 329
- Enclosure Problems 330
- Overheating 332
- Power Supplies 332
- Batteries 333
- Controller Problems 334
- Serial Connection 335
- Telnet Connection 336
- Physical Drive Problems 338
- Incomplete Array 342
- Connection Problems 344
- Network Connections 345
- Fibre Channel Connections 345
- SAS Connections 346
- Power Cycling the Subsystem 348
- Event Notification Response 349
- Chapter 9: Support 367
- Logging In 369
- Connection 370
- Timeouts 370
- Email Messages 370
- User Management 371
- Disk Array Degraded 371
- Media Patrol and PDM 372
- Contacting Technical Support 373
- Attn: Technical Support 375
- Limited Warranty 376
- Your Responsibilities 377
- SNMP MIB Files 381
- Before You Begin 385
- Installing PerfectPath 386
- Verifying Installation 387
- Running Perfect Path View 389
- Viewing LUN Properties 390
- Viewing Path Properties 391
- Viewing Events 395
- Clearing Path Statistics 395
- Features and Settings 396
- Load Balance Policy 397
- Path Verification 398
- PDO Removal 399
- Performance Tab Refresh Rate 400
- Round Robin Count 400
- Refreshing the Objects 401
- Viewing System Information 401
- Saving System Information 402
- Troubleshooting 403
- Updating PerfectPath 404
- Repairing PerfectPath 405
- Removing PerfectPath 406
- Check Initial Setup 408
- Installing Packages 409
- Verifying Packages – RedHat 410
- Verifying Packages – SuSE 410
- RedHat Systems 412
- SuSE Systems 412
- Editing a Configuration File 412
- Setting the Daemon to Run 414
- Task 5: Setting-up ALUA 417
- RedHat Linux RHEL 5.5 418
- SuSE Linux SLES 10 SP3 419
- SuSE Linux SLES 11 420
- SuSE Linux SLES 11 SP1 421
- Linux MPIO: Known Issues 424
- Sample multipath.conf File 425
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