HP LH4r Integrated HP NetRaid Controller Configuration Guide - Page 3

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Contents 1 Introduction 1 Integrated HP NetRAID Controller 1 Features of the Integrated HP NetRAID Controller 1 Channels and Devices 1 Controller Hardware 2 SCSI Firmware 3 Array Spanning 3 I2O Support 3 Physical Disk Roaming 3 Multiple Adapters 3 Fault-Tolerance and Management Features 4 Changing Capacity and RAID Levels 4 About This Guide 5 Other Information Sources 5 2 RAID Overview 7 RAID Overview 7 Physical Drives 7 Arrays ...7 Hot Spares 8 Logical Drives 8 Understanding RAID Levels 9 Arrays with No Redundancy: RAID Level 0 10 Non-spanned Arrays with Redundancy: RAID Levels 1, 3, and 5 11 Spanned Arrays: RAID Levels 10, 30, and 50 14 3 Configuration Overview 21 4 Planning ...23 Overview ...23 Step A. Plan Your Hardware 23 Gather Information 23 Sample Worksheet A 24 Channels 25 Step B. Plan Arrays and Logical Drives 27 Automatic Configuration 27 iii

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iii
Contents
1
Introduction
..................................................................................................
1
Integrated HP NetRAID Controller
..................................................................
1
Features of the Integrated HP NetRAID Controller
.........................................
1
Channels and Devices
...............................................................................
1
Controller Hardware
...................................................................................
2
SCSI Firmware
..........................................................................................
3
Array Spanning
..........................................................................................
3
I
2
O Support
................................................................................................
3
Physical Disk Roaming
..............................................................................
3
Multiple Adapters
.......................................................................................
3
Fault-Tolerance and Management Features
...............................................
4
Changing Capacity and RAID Levels
.........................................................
4
About This Guide
...........................................................................................
5
Other Information Sources
.............................................................................
5
2
RAID Overview
.............................................................................................
7
RAID Overview
..............................................................................................
7
Physical Drives
..........................................................................................
7
Arrays
........................................................................................................
7
Hot Spares
.................................................................................................
8
Logical Drives
............................................................................................
8
Understanding RAID Levels
...........................................................................
9
Arrays with No Redundancy: RAID Level 0
..............................................
10
Non-spanned Arrays with Redundancy: RAID Levels 1, 3, and 5
..............
11
Spanned Arrays: RAID Levels 10, 30, and 50
..........................................
14
3
Configuration Overview
.............................................................................
21
4
Planning
.....................................................................................................
23
Overview
.....................................................................................................
23
Step A. Plan Your Hardware
........................................................................
23
Gather Information
...................................................................................
23
Sample Worksheet A
...............................................................................
24
Channels
.................................................................................................
25
Step B. Plan Arrays and Logical Drives
........................................................
27
Automatic Configuration
...........................................................................
27