Adaptec 2270700-R Scheda Tecnica Pagina 103
- Pagina / 155
- Indice
- SEGNALIBRI
Valutato. / 5. Basato su recensioni clienti
Appendix B: Understanding RAID ● 102
RAID 6 Arrays
A RAID 6 array—also known as dual drive failure protection—is similar to a RAID 5 array
because it uses data striping and parity data to provide redundancy. However, RAID 6 arrays
include two independent sets of parity data instead of one. Both sets of parity data are striped
separately across all disk drives in the array.
RAID 6 arrays 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 arrays).
RAID 6 arrays must be built from at least four disk drives. Maximum stripe size depends on
the number of disk drives in the array.
RAID 60 Arrays
Similar to a RAID 50 array (see page 101), a RAID 60 array—also known as dual drive failure
protection—is built from eight disk drives configured as two or more RAID 6 arrays, and
stripes stored data and two sets of parity data across all disk drives in both RAID 6 arrays.
Two sets of parity data provide enhanced data protection, and striping improves performance.
RAID 60 arrays also provide high data transfer speeds.
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
1 P1 ... P2
2 P2 ... 449
P1 3 ... P1
P2 4 ... 500
Unused Space = 150 GB
Disk Drives in Logical Drive Based on the drive segment sizes used:
RAID 6 Logical Drive = 500 GB plus
parity (P1 & P2)
Unused Space = 150 GB
- Installation and User’s Guide 1
- Copyright 2
- Trademarks 2
- Disclaimer 2
- Contents 7
- 4 Getting Started 8
- 6 Creating a Bootable Array 8
- 9 Managing Your Storage Space 9
- 10 Solving Problems 9
- A Introduction to SAS 10
- B Understanding RAID 10
- Contents ● 11 11
- F Safety Information 12
- G Technical Specifications 12
- About This Guide 13
- How to Find More Information 14
- Kit Contents and System 15
- Requirements 15
- Kit Contents 16
- DVD-ROM drive 17
- About Your RAID Controller 18
- Array-level Features 19
- Adding a Flash Backup Module 20
- About the Adaptec RAID 5085 21
- About the Adaptec RAID 5405 22
- About the Adaptec RAID 5445 23
- About the Adaptec RAID 51245 25
- About the Adaptec RAID 51645 26
- About the Adaptec RAID 52445 27
- About the Adaptec RAID 5405Z 28
- About the Adaptec RAID 5445Z 29
- About the Adaptec RAID 2045 31
- Adaptec RAID 2405/2405Q 32
- About the Adaptec RAID 2805 33
- About the Adaptec RAID 6405 34
- About the Adaptec RAID 6445 35
- About the Adaptec RAID 6405E 37
- About the Adaptec RAID 6805E 38
- About the Adaptec RAID 6405T 39
- Getting Started 41
- Choosing a RAID Level 42
- Disk Drives 43
- Installation Options 46
- Basic Installation Steps 46
- In this chapter 47
- Installing the Controller 48
- Supercapacitor 50
- Connector on daughterboard 50
- SAS/SATA 51
- Single-port connector 51
- Typical SSD installation 53
- Connecting External Devices 54
- Next Steps 54
- Creating a Bootable Array 55
- Setting the Boot Controller 56
- Creating an Array 56
- Making Your Array Bootable 59
- Installing the Driver and an 60
- Operating System 60
- Creating a Driver Disk 61
- Installing with Windows 62
- Installing with SuSE Linux 64
- Installing with Debian Linux 64
- Installing with Ubuntu Linux 66
- Installing with Solaris 68
- Installing with VMware ESX 4 68
- Installing with VMware ESXi 5 69
- Installing with FreeBSD 72
- Installing on Windows 75
- Installing on Debian Linux 76
- Installing on Ubuntu Linux 76
- Installing on Solaris 77
- Installing on VMware 77
- Installing on FreeBSD 79
- Managing Your Storage Space 80
- About Adaptec Storage Manager 81
- Which Utility Should I Use? 82
- Solving Problems 84
- Failed Device is faulty On 85
- Other No error Off 85
- Resetting the Controller 87
- Introduction to SAS 89
- What is SAS? 90
- What’s a Phy? 91
- What’s a SAS Port? 92
- What’s a SAS Address? 92
- What’s a SAS Connector? 92
- What do SAS Cables Look Like? 92
- Direct-attach Connections 93
- Backplane Connections 93
- SAS Expander Connections 94
- Understanding RAID 96
- Understanding Drive Segments 97
- Non-redundant Arrays (RAID 0) 97
- RAID 1 Arrays 98
- RAID 1 Enhanced Arrays 98
- RAID 10 Arrays 99
- RAID 5 Arrays 100
- RAID 5EE Arrays 101
- RAID 50 Arrays 102
- RAID 6 Arrays 103
- RAID 60 Arrays 103
- Selecting the Best RAID Level 104
- Using the Adaptec RAID 105
- Configuration Utility 105
- Running the ARC Utility 106
- Managing Existing Arrays 107
- Option Description 108
- Initializing Disk Drives 109
- Rescanning Disk Drives 109
- Secure Erasing Disk Drives 109
- Managing Global Hot Spares 109
- Creating a New JBOD 110
- Managing Existing JBODs 110
- Opening SerialSelect 111
- Applying Changes and Exiting 111
- General Controller Settings 112
- Power Management Settings 113
- Locating Disk Drives 114
- Identifying Disk Drives 115
- Viewing the Event Log 115
- System Requirements 117
- Before You Begin 117
- Running the Menu-based AFU 118
- Running the 119
- Quick Reference 123
- 22-55-2161 124
- Pin Number 124
- Specification 126
- Connector Specification 129
- J5 Pin Number Signal 131
- 2258500-R ASR-51645 RoHS Kit 133
- J4 Pin Number Signal 139
- Safety Information 148
- Technical Specifications 149
- Environmental Specifications 150
- DC Power Requirements 150
- Current Requirements 150
- Index ● 151 152
- Index ● 152 153
- Index ● 153 154
- PMC-Sierra, Inc 155
- 1380 Bordeaux Drive 155
- Sunnyvale, CA 94089 USA 155
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