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RAID 6 Logical Drives
A RAID 6 logical drive—also known as dual drive failure protection—is similar to a RAID 5 logical drive
because it uses data striping and parity data to provide redundancy. However, RAID 6 logical drives
include two independent sets of parity data instead of one. Both sets of parity data are striped separately
across all disk drives in the logical drive.
RAID 6 logical drives provide extra protection for your data because they can recover from two
simultaneous disk drive failures. However, the extra parity calculation slows performance (compared
to RAID 5 logical drives).
RAID 6 logical drives must be built from at least four disk drives. Maximum stripe size depends on the
number of disk drives in the logical drive.
Unused Space = 150 GB
Disk Drive 1
Disk Drive 2
Disk Drive 3
Disk Drive 4
250 GB
250 GB
400 GB
400 GB
Drive Segment Size
(Smallest Disk Drive)
Disk Drive 2
Disk Drive 3
Disk Drive 4
Disk Drive 1
Unused Space = 150 GB
Disk Drives in Logical Drive
Based on the drive segment sizes used:
(P1 & P2)
RAID 6 Logical Drive = 500 GB plus parity
P21 P1 . . .
4492 P2 . . .
P1P1 3 . . .
500P2 4 . . .
RAID 60 Logical Drives
Similar to a RAID 50 logical drive (see RAID 50 Logical Drive on page 121), a RAID 60 logical drive—also
known as dual drive failure protection—is built from eight disk drives congured as two or more RAID
6 logical drives, and stripes stored data and two sets of parity data across all disk drives in both RAID 6
logical drives.
Two sets of parity data provide enhanced data protection, and striping improves performance. RAID 60
logical drives also provide high data transfer speeds.
122Proprietary and Condential to PMC-Sierra, Inc.
Document No.: CDP-00278-02-A Rev. A, Issue:
maxView Storage Manager User's Guide
- Manager User's Guide 1
- Revision History 3
- Contents 4
- Software License Agreement 10
- Sunnyvale, CA 94089 12
- (408) 239-8000 12
- 1 About this Guide 13
- How to Find More Information 14
- Getting Started 15
- About maxView Storage Manager 15
- System Requirements 17
- Browser Support 17
- A Simple Storage Space 18
- An Advanced Storage Space 18
- Network Connection 19
- Installing on Windows 20
- Installing on Solaris 22
- Installing on VMware ESX 4.1 23
- Installing on VMware ESXi 5.x 24
- Uninstalling from Windows 26
- Uninstalling from Solaris 26
- Overview of the Main Window 28
- The Enterprise View 29
- Tabs provide quick access 31
- Chart view of free 31
- Click this tab to open 32
- Click this tab to 32
- Two disk drives plus a 33
- The maxCache Container is 33
- Getting Help 34
- 5 Building Your Storage Space 35
- Starting the Agent Only 36
- Linux or VMware 37
- Creating Logical Drives 39
- Custom Conguration 41
- Disable maxCache if you 43
- Container 43
- 6 Protecting Your Data 45
- Deleting a Global Hot Spare 47
- Enabling Copyback 49
- Enabling Automatic Failover 50
- Understanding Logical Drives 52
- Fine-tuning Logical Drives 55
- Changing the Stripe Size 57
- Verifying Logical Drives 58
- Enabled or Disabled 60
- Erasing a Logical Drive 62
- Deleting a Logical Drive 62
- Creating a maxCache Container 63
- Once or Always 65
- Enabled 68
- Disabled 70
- Scheduling a Task 71
- Monitoring Tasks 72
- Modifying a Task 73
- Deleting a Task 74
- Viewing Device Properties 75
- Locating a Disk Drive 76
- Initializing Disk Drives 79
- Erasing Disk Drives 79
- Working with Controllers 81
- Rescanning a Controller 82
- Working with System Alarms 83
- Before You Begin 84
- .ufi le), click Open 85
- Monitoring Options 88
- Single-click to view 89
- Monitoring Enclosure Status 92
- Viewing SMART Statistics 92
- Hover text reveals 93
- Setting Up Email Notications 93
- Sending a Test Message 96
- Setting up Statistics Logging 99
- Viewing Advanced Statistics 100
- Select a component in 100
- Controller Statistics 101
- Deploying Servers 103
- Managing Remote Systems 105
- Removing a Remote System 106
- 12 Solving Problems 110
- Rebuilding Logical Drives 113
- Comparing RAID Levels 115
- Understanding Drive Segments 115
- RAID 1 Logical Drives 116
- RAID 10 Logical Drives 118
- RAID 5 Logical Drives 119
- RAID 5EE Logical Drives 120
- RAID 50 Logical Drive 121
- RAID 6 Logical Drives 122
- RAID 60 Logical Drives 122
- B Icons At-a-Glance 123
- PMC-Sierra, Inc 133
- 1380 Bordeaux Drive 133
- Sunnyvale, CA 94089 USA 133
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