Adaptec 1891300 - RAID Controller User's Guide Page 31
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Chapter 4: Getting Started ● 31
Choosing a RAID Level
This section provides a brief overview of the RAID levels supported by your Adaptec RAID
controller, including the minimum and maximum number of disk drives required by each.
● RAID 0 (Non-redundant Array)—Stripes data across multiple disk drives. Improved
performance but no redundancy (see page 76).
●
RAID 1 Array
—
Created from two disk drives where one disk drive is a
mirror
of the other
(the same data is stored on each disk drive). Redundancy, but reduced capacity (see page 77).
●
RAID 1E Array
—
Similar to a RAID 1 array except that data is mirrored
and
striped, and more
disk drives can be included (see page 77).
● RAID 5 Array—Stripes data for improved performance and uses parity data to provide
redundancy (see page 79).
● RAID 5EE Array—Similar to a RAID 5 array, but includes a distributed spare and must
include a minimum of four disk drives (see page 80).
● RAID 10 Array—Built from two or more equal-sized RAID 1 arrays, stripes and mirrors
data across multiple disk drives. Redundancy and improved performance (see page 78).
● RAID 50
1
Array—Built from multiple disk drives configured as two or more RAID 5
arrays, stripes stored data and parity data across all disk drives (see page 81).
● RAID 6 Array—Similar to a RAID 5 array except that it includes two independent sets of
parity data instead of one (see page 82).
● RAID 60
1
Array—Similar to a RAID 50 array except that it includes four independent sets
of parity data instead of two (see page 82).
Use the table on page 83 to see how many disk drives you must connect to your RAID
controller to support the RAID level you want.
1
The Adaptec 2420SA RAID ccontroller does not support RAID 50.
- Installation and User’s Guide 1
- Copyright 2
- Trademarks 2
- Disclaimer 2
- Adaptec Customer Support 3
- Canadian Compliance Statement 5
- Contents 6
- Safety Information 10
- Technical Specifications 10
- About This Guide 11
- How to Find More Information 12
- Kit Contents and System 13
- Requirements 13
- Kit Contents 14
- About Your RAID Controller 15
- Array-level Features 16
- Adding Enhanced Features 17
- About the Adaptec 3085 18
- About the Adaptec 3405 19
- About the Adaptec 3805 20
- About the Adaptec 31205 21
- About the Adaptec 31605 22
- Mode 0 Flash connector 22
- About the Adaptec 4000 23
- About the Adaptec 4800SAS 24
- 256 MB also available 24
- About the Adaptec 4805SAS 25
- About the Adaptec 2420SA 26
- About the Adaptec 2820SA 27
- About the Adaptec 2130SLP 28
- About the Adaptec 2230SLP 29
- Getting Started 30
- Choosing a RAID Level 31
- Selecting Disk Drives 32
- Selecting Cables 33
- SATA Cables 34
- Installation Options 35
- Basic Installation Steps 35
- In this chapter 37
- Installing the Controller 38
- Connecting External Devices 42
- Creating a Bootable Array 43
- Setting the Boot Controller 44
- Creating an Array 44
- Making Your Array Bootable 47
- Installing the Driver and an 48
- Operating System 48
- Creating a Driver Disk 49
- Installing with Windows 50
- Installing with Red Hat Linux 50
- Installing with SUSE Linux 51
- Installing with NetWare 51
- Installing with OpenServer 52
- Installing with Solaris 52
- Installing with UnixWare 53
- Installing with VMware 53
- Installing with FreeBSD 54
- Installing on Windows 57
- Installing on NetWare 57
- Installing on OpenServer 58
- Installing on Solaris 58
- Installing on UnixWare 59
- Installing on VMware 59
- Installing on FreeBSD 60
- Managing Your Storage Space 61
- About Adaptec Storage Manager 62
- Which Utility Should I Use? 63
- Solving Problems 64
- Troubleshooting Checklist 65
- Silencing the Alarm 65
- Resetting the Controller 67
- ) Web site at www.scsita.org 68
- In this appendix 68
- What is SAS? 69
- What’s a Phy? 70
- What’s a SAS Port? 71
- What’s a SAS Address? 71
- What’s a SAS Connector? 71
- What do SAS Cables Look Like? 71
- Direct-attach Connections 72
- Backplane Connections 72
- SAS Expander Connections 73
- Understanding RAID 75
- Understanding Drive Segments 76
- Non-redundant Arrays (RAID 0) 76
- RAID 1 Arrays 77
- RAID 1 Enhanced Arrays 77
- RAID 10 Arrays 78
- RAID 5 Arrays 79
- RAID 5EE Arrays 80
- RAID 50 Arrays 81
- RAID 6 Arrays 82
- RAID 60 Arrays 82
- Selecting the Best RAID Level 83
- Using the Adaptec RAID 84
- Configuration Utility 84
- Running the ARC Utility 85
- Managing Existing Arrays 86
- Initializing Disk Drives 86
- Rescanning Disk Drives 86
- Secure Erasing Disk Drives 87
- Opening a -Select Utility 87
- Applying Changes and Exiting 87
- General Controller Settings 88
- Option Description 89
- Locating Disk Drives 91
- Identifying Disk Drives 91
- Viewing the Event Log 92
- Running the ACU Using Scripts 95
- About Record Mode 96
- Required 97
- ? Description 97
- HotspareDrives=0:0:0,0:1:0 98
- InitializeAll=Yes 98
- ACU exits with an error 99
- Keyword Description 100
- ACU Error Codes 101
- Sample Scripts 102
- System Requirements 105
- Before You Begin 105
- Running the Menu-based AFU 106
- Running the 107
- I2C Connector Reference 111
- Pin Number Signal Description 112
- 22-55-2161 114
- Pin Number 114
- SFF-8087 Connector J5: 125
- SFF-8087 Connector J18: 125
- SFF-8087 Connector J14: 125
- 22-552101 126
- SFF-8484 Connector J7: 128
- Electrostatic Discharge (ESD) 129
- Environmental Specifications 131
- DC Power Requirements 131
- Current Requirements 131
- Index ● 133 133
- Index ● 134 134
- Index ● 135 135
- Index ● 136 136
- Adaptec, Inc 137
- 691 South Milpitas Boulevard 137
- Milpitas, CA 95035 USA 137
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