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VTrak M610p Product Manual
194
RAID 6 – Block and Double Parity Stripe
RAID level 6 stores dual parity data is rotated across the physical drives along
with the block data. A RAID 6 disk logical drive can continue to accept I/O
requests when any two physical drives fail.
The total capacity of a RAID 6 disk logical drive is the smallest physical drive
times the number of physical drives, minus two.
Hence, a RAID 6 disk logical drive with (6) 100 GB hard drives will have a
capacity of 400 GB. A disk logical drive with (4) 100 GB hard drives will have a
capacity of 200GB.
RAID 6 becomes more capacity efficient in terms of physical drives as the
number of physical drives increases.
RAID 6 offers double fault tolerance. Your logical drive remains available when
up to two physical drives fail.
RAID 6 is generally considered to be the safest RAID level.
RAID 6 requires a minimum of four physical drives and a maximum of 16.
Recommended applications: Accounting, financial, and database servers; any
application requiring very high availability.
Double Distributed (Wide-space Q+Q) Parity
physical drives
Data
Blocks
- Product Manual 1
- Copyright 2
- Trademarks 2
- Recommendations 2
- VTrak M610p Product Manual 10
- Contents 11
- About This Manual 13
- VTrak Overview 14
- Architectural Description 15
- Features and Benefits 15
- Operational Features 16
- Specifications 17
- Warranty and Support 18
- FCC Statement 18
- CE Statement 18
- MIC Statement 18
- Chapter 2: VTrak Installation 19
- Mounting VTrak in a Rack 20
- Installing Disk Drives 22
- Serial ATA Disk Drive 24
- Data Path 25
- Management Path 25
- Connecting the Power 28
- LED will remain dark 29
- Chapter 3: VTrak Setup 31
- Setting up VTrak with the CLI 33
- Setting up VTrak with the CLU 34
- Exiting the CLU 35
- Logging into WebPAM PROe 36
- Chapter 3: Setup 37
- Selecting a Language 38
- Creating a Disk Array 38
- Automatic 39
- Advanced 41
- Logging out of WebPAM PROe 42
- Perusing the Interface 49
- Using the Header 50
- Using Tree View 51
- Using Management View 52
- Viewing the Event Frame 52
- Viewing Other Subsytems 54
- Logging into a Subsystem 54
- Hiding the Other Subsystems 54
- Working with Subsystems 55
- Viewing the Runtime Event Log 56
- Saving the Runtime Event Log 57
- Viewing NVRAM Events 57
- Saving NVRAM Events 58
- Running Background Activities 60
- Running Media Patrol 60
- Viewing Scheduled Activities 61
- Scheduling an Activity 61
- Deleting a Scheduled Activity 62
- Viewing Lock Status 62
- Setting the Lock 63
- Renewing the Lock 63
- Making Your Own User Settings 66
- Changing Your Own Password 67
- Creating a User 68
- Viewing User Sessions 69
- Logging out Other Users 69
- Managing Storage Services 73
- LUN Mapping Parameters 74
- Managing Software Services 75
- Making Web Server Settings 76
- Changing the Startup Setting 77
- Stopping Web Server service 77
- Adding Trap Sinks 79
- Deleting Trap Sinks 79
- Deleting Netsend Recipients 82
- Stopping Netsend service 82
- Exporting the User Database 83
- Importing a User Database 84
- Managing Controllers 90
- Adjustable items 91
- Upgradable items 91
- Viewing Controller Statistics 92
- Making Controller Settings 92
- Clearing an Orphan Watermark 93
- Managing Enclosures 94
- Viewing Enclosure Information 95
- Making Enclosure Settings 96
- Viewing FRU VPD Information 96
- Testing the Buzzer 98
- Adjustable Items 100
- Clearing Statistics 101
- Managing Disk Arrays 104
- Deleting a Disk Array 108
- Disk Array Operational Status 109
- Creating a Logical Drive 110
- Making Disk Array Settings 110
- Deleting a Logical Drive 111
- Migrating a Disk Array 112
- Rebuilding a Disk Array 113
- Running PDM on a Disk Array 114
- Transitioning a Disk Array 115
- Managing Logical Drives 117
- Logical Drive Status 118
- Logical Drive Synchronization 118
- Making Logical Drive Settings 119
- Initializing a Logical Drive 119
- Running Redundancy Check 120
- Table Definitions 122
- Managing Spare Drives 123
- Creating a Spare Drive 124
- Deleting Spare Drive 125
- Making Spare Drive Settings 125
- Running Spare Check 126
- Logging into the CLU 130
- Accessing Online Help 132
- Logging out of the CLU 132
- Running Quick Setup 133
- Managing the Subsystem 134
- Resetting the Lock 135
- Releasing the Lock 135
- Managing the Controllers 136
- Locating the Controller 137
- Managing the Enclosure 138
- Viewing Blower Status 139
- Viewing Voltage Sensor Status 139
- Checking the Batteries 140
- Reconditioning a Battery 140
- Locating an Enclosure 141
- Managing Physical Drives 142
- Viewing Advanced Information 143
- Locating a Physical Drive 144
- Accepting an Incomplete Array 151
- Enabling PDM on a Disk Array 151
- Running PDM 153
- Locating a Disk Array 154
- Setting Read Cache Policy 157
- Locating a Logical Drive 158
- Making Automatic Settings 159
- Making Manual Settings 159
- Managing SCSI Connections 160
- Setting SCSI Termination 161
- Managing Background Activity 162
- Working with the Event Viewer 164
- Clearing NVRAM Events 165
- Deleting a Spare Drive 168
- Working with LUN Mapping 169
- Managing Users 170
- Changing a User’s Password 171
- Deleting a User 172
- Making Email Settings 173
- Making SLP Settings 174
- Making Webserver Settings 174
- Making Telnet Settings 175
- Making SNMP Settings 175
- Managing SNMP Trap Sinks 176
- Making CIM Settings 177
- Making Netsend Settings 177
- Managing Netsend Recipients 178
- Deleting a Recipient 179
- Netsend Requirements 179
- Flashing through TFTP 180
- Restoring Factory Defaults 182
- Shutting Down the Subsystem 183
- Restarting the Subsystem 185
- Making Buzzer Settings 186
- Chapter 6: Maintenance 187
- Updating the Firmware 190
- Replacing a Power Supply 192
- Replacing a Cooling Unit Fan 193
- Replacing a Cache Battery 196
- Replacing a RAID Controller 199
- Introduction to RAID 201
- RAID 0 – Stripe 202
- RAID 1 – Mirror 203
- RAID 1E – Enhanced Mirror 204
- RAID 10 – Mirror + Stripe 207
- RAID 50 Axles 208
- Choosing a RAID Level 210
- Choosing Stripe Size 213
- Choosing Sector Size 213
- Cache Policy 214
- Write Cache Policy 215
- Adaptive Writeback Cache 215
- Capacity Coercion 216
- Initialization 216
- Hot Spare Drive(s) 217
- RAID Level Migration 217
- Media Patrol 220
- PDM Triggers 221
- Transition 222
- Automatic Transition 224
- Manual Transition 224
- Chapter 8: Troubleshooting 225
- VTrak is Beeping 226
- LEDs Display Amber or Red 227
- Drive Status Indicators 228
- Back of Enclosure 229
- CLU Reports a Problem 232
- Checking a Reported Component 233
- WebPAM PROe Reports a Problem 234
- Event Notification Response 237
- When a Physical Drive Fails 251
- With a Hot Spare Drive 251
- Without a Hot Spare Drive 252
- Rebuild Operation 252
- Incomplete Array 254
- Physical Drive Problems 255
- Enclosure Problems 257
- Connection Problems 260
- SCSI Connections 261
- Termination 262
- Chapter 9: Support 265
- Contacting Technical Support 267
- United States 268
- The Netherlands 268
- Attn: Technical Support 269
- Limited Warranty 270
- Returning Product For Repair 271
- SNMP MIB Files 273
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