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Redundant Controller
10-3
The physical connection between redundant controllers should be similar
to the one shown above. The basic configuration rules are:
1. All channels should be connected to both controllers as diagrammed
above or strung across via a common backplane. Disk drives are
connected to both controllers.
2. Cached writes are constantly duplicated in both controllers’ memory
over a dedicated SCSI channel. The default path for controller
communications (SCSI-based controllers) is channel 0.
Channel 0 is also the default for host interface; therefore, avail other
channel(s) for host connection by changing its channel mode. See
Chapter 7 for details about channel mode configuration.
3. SCSI channels should be terminated on both ends. It is
recommended to use the termination jumpers on the SCSI-based
controllers to configure the termination setting. Terminators are
provided on controller back-end PCBs. This design allows the
controller to be removed during the controller failover process.
Fibre-Based Controllers
Connection between controllers is more flexible with the Fibre-based
controllers.
Figure 10 - 2 Dual-Controller Configuration Using Fibre-
Based Controllers
- Infortrend 1
- Generic Operation Manual 1
- Asia Pacific 2
- Americas 2
- Printed in Taiwan 3
- Table of Contents 4
- Chapter 7 Terminal Operation 7
- Chapter 8 Fibre Operation 8
- Chapter 12 Array Expansion 11
- Appendix D Event Messages 12
- Functional Table of Contents 13
- Chapter 8 Fibre Operation 15
- Chapter 12 Array Expansion 16
- Upgrading Firmware 17
- List of Tables 18
- List of Figures 18
- About This Manual 20
- Revision History: 21
- RAID Functions: 23
- An Introduction 23
- 1.3 RAID Levels 24
- Figure 1 - 2 NRAID 25
- Figure 1 - 3 JBOD 25
- RAID (0+1) 26
- 1.4 Spare Drives 28
- A Local Spare always has 29
- Global Spare 29
- 1.5 Identifying Drives 30
- 1.6 Rebuild 31
- 2. Manual Rebuild 32
- What is a logical volume? 34
- RAID 5 Logical Drive 35
- 24 drives, 1 redundancy drive 35
- Logical Volume 36
- 24 drives, 4 redundancy drive 36
- Multi-level RAID systems 39
- RAID (3+0) 39
- RAID (5+0) 39
- RAID Planning 40
- Optimization Mode 42
- 7. What RAID level? 42
- 8. Any spare drives? 43
- 9. Limitations? 43
- Configuring the Array: 44
- 2.3 Operation Theory 46
- 2.4 Tunable Parameters 49
- Accessing the Array 52
- Ethernet 52
- 3.2 Out-of-Band via Ethernet 55
- Other Concerns 56
- Requirements 56
- 5. Starting the Manager: 59
- 3.2.3 NPC Onboard 60
- The SNMP_TRAP section 61
- The EMAIL section 61
- The BROADCAST section 61
- LCD Screen Messages 62
- 4.3 Logical Drive Status 63
- 4.4 Logical Volume Status 64
- 4.5 SCSI Drive Status 65
- CH0=Host = 66
- 4.8 Cache Dirty Percentage 68
- 4.9 View and Edit Event Logs 68
- LCD Keypad Operation 69
- 5.3 View Connected Drives: 73
- 5.4 Creating a Logical Drive 74
- Spare Drive Assignments: 75
- Disk Reserved Space: 75
- Write Policy: 75
- Initialization Mode: 75
- Stripe Size: 76
- Beginning Initialization 76
- 5.5 Creating a Logical Volume 78
- Logical Volume Assignment 79
- Drive to Host LUN 81
- Adding a Global Spare Drive 83
- Rebuild Settings 83
- Scanning New SCSI Drive 91
- Identifying a Drive 92
- Viewing IDs 94
- Adding a Channel ID 94
- Deleting a Channel ID 95
- Setting Transfer Speed 97
- Setting Transfer Width 98
- Parity Check 100
- Disconnecting Support 100
- Maximum Tag Count 100
- IMPORTANT! 101
- Restore to Default Setting 101
- 5.13 System Functions 102
- Reset Controller 103
- Shutdown Controller 103
- Disabling Password 103
- Controller Maintenance 104
- Saving NVRAM to Disks 104
- Restore NVRAM from Disks 104
- 5.14 Controller Parameters 105
- Controller Date and Time 106
- Time Zone 106
- Date and Time 107
- 5.15 SCSI Drive Utilities 108
- SCSI Drive Read/Write Test 109
- Terminal Screen Messages 110
- 6.2 Main Menu 111
- 6.3 Quick Installation 111
- 6.4 Logical Drive Status 113
- 6.5 Logical Volume Status 114
- 6.6 SCSI Drive Status 115
- 6.7 SCSI Channel’s Status 116
- CurSynClk 117
- Terminal Operation 120
- Limitations: 121
- 7.4 Creating a Logical Drive 124
- Choosing a RAID Level: 125
- Choosing Member Drives: 125
- Logical Drive Preferences: 125
- Maximum Drive Capacity: 125
- Assign Spare Drives: 126
- Disk Reserved Space 126
- Logical Drive Assignments: 126
- Write Policy 126
- Initialization Mode 127
- Stripe Size 127
- 7.5 Creating a Logical Volume 129
- WARNING! 131
- Settings 134
- Drive Members 135
- Partition 1 136
- Rebuilding a Logical Drive 137
- Media Scan 138
- Edit Host-ID/WWN Name List 140
- Pass-through SCSI Commands 140
- Scanning New Drive 141
- Slot Number 142
- Drive Entry 142
- Identifying Drive 142
- Redefining Channel Mode 144
- Viewing and Editing SCSI IDs 145
- Deleting an ID 146
- Setting Channel Terminator 147
- Setting a Transfer Speed 147
- Setting the Transfer Width 148
- Maximum Transfer Width 150
- Data Rate 151
- 7.13 System Functions 153
- Changing the Password 154
- Setting a New Password 154
- Disabling the Password 155
- 7.14 Controller Parameters 156
- Password Validation Timeout 158
- Controller Unique Identifier 158
- Set Controller Date and Time 160
- 7.15 Drive Information 161
- SCSI Drive Low-level Format 162
- Fibre Operation 164
- 8.2 Major Concerns 165
- 8.3 Supported Features 167
- Drive IDs: 168
- Parameters 169
- (RCC Channel): 170
- View Channel WWN 170
- View and Edit Fibre Drive 171
- View Drive Information 172
- 2. Drive-Side Dual Loop: 173
- Filtering 177
- Creating LUN Masks 178
- WWN Name List 179
- Sample Configuration: 183
- Configuration Procedure: 184
- Advanced Configurations 186
- 9.1.1 Clone Failing Drive: 187
- Perpetual Clone: 188
- A. Introduction 190
- Disable: 191
- Detect Only: 191
- Clone + Replace: 191
- Configuration Procedure 192
- Using S.M.A.R.T. Functions 193
- Connection: 197
- Maximum Queued I/O Count: 198
- LUNs per Host SCSI ID 198
- LUN Applicability: 198
- Peripheral Device Type: 199
- In-band (SCSI or Fibre): 199
- Operating Systems: 200
- 9.2.2 Drive-side Parameters: 203
- SCSI Motor Spin-Up 203
- SCSI Reset at Power-Up 204
- Disk Access Delay Time 205
- SCSI I/O Timeout 205
- Periodic Drive Check Time 207
- Idle Drive Failure Detection 208
- Dynamic Switch Write-Policy 210
- 9.4 Disk Array Parameters 212
- Verification on Writes 213
- Redundant Controller 214
- 10.1.1 Setup Flowchart 215
- Connection 215
- Fibre-Based Controllers 216
- Primary and Secondary IDs 219
- 10.1.4 Fault-Tolerance 221
- A.Channel Bus 222
- Replacing a Failed Unit: 224
- Auto-Failback: 224
- E. Controller Failure 226
- 10.2 Preparing Controllers 227
- Controller Settings: 228
- 10.2.2 Limitations 229
- Cache Synchronization 230
- Battery Support 230
- Infortrend10-18 231
- 10.3 Configuration 232
- 10.3.1 Via Front Panel Keypad 233
- 2. Controller Unique ID 234
- Drive Channel 235
- Controller 236
- Secondary 238
- Controller Replaced? 244
- Channel) 247
- Secondary Controller RS-232 247
- Remote Redundant Controller 247
- Record of Settings 248
- Partition Information 249
- Logical Volume Information 250
- 11.3 View and Edit Host LUN’s 251
- Host Filter Entries 252
- Caching Parameters 256
- Host Side SCSI Parameters 256
- Drive Side SCSI Parameters 256
- 11.9 RAID Security: Password 259
- Array Expansion 260
- Note on Expansion 261
- 12.2 Mode 1 Expansion: 263
- 12.3 Mode 2 Expansion: 266
- Larger Capacity 266
- Expand Logical Drive 268
- 12.5 Expand Logical Volume 270
- Volume Extension in 271
- Windows 2000 271
- LCD Keypad Navigation Map 277
- View & Edit 278
- Navigation Map 279
- Firmware Functionality 284
- Specifications 284
- Advanced Features: 285
- Caching Operation: 286
- RAID Expansion: 287
- Fibre Channel Support: 288
- S.M.A.R.T. Support: 289
- Redundant Controller: 289
- Data Safety: 290
- System Security: 291
- Environment Management: 292
- User Interface: 293
- Remote Manageability: 293
- JBOD-Specific: 294
- System Functions: 295
- RAIDWatch Manager 296
- Emulation 298
- Event Messages 301
- Logical Drive Event 303
- General Target Events 303
- Controller Event 307
- Logical Drive Event: 317
- General Target Events: 322
- IndexIndex 340
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