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Adaptec 1430SA User Guide - Page 47

Understanding RAID

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Understanding RAID A In this chapter... RAID Technology Overview 48 RAID 0 (Non-RAID Arrays 49 RAID 1 Arrays ...50 RAID 10 Arrays ...50 When you create arrays (or logical drives), you can assign a RAID level to protect your data. Each RAID level offers a unique combination of performance and redundancy. RAID levels also vary by the number of disk drives they support. This appendix describes the RAID levels supported by your HostRAID controller, and provides a basic overview of each to help you select the best level of protection for your data storage.

Section	Page
Contents	6
About This Guide	10
What You Need to Know Before You Begin	11
Terminology Used in this Guide	11
How to Find More Information	11
About Your HostRAID Controller	12
HostRAID Controller Features	13
Array Level Features	13
Upgrading the HostRAID Controller Firmware	13
About the Adaptec 1430SA Controller	14
About the Adaptec 1420SA Controller	15
About the Adaptec 1220SA Controller	16
Kit Contents and System Requirements	17
Kit Contents	18
System Requirements	18
Getting Started	19
Choosing a RAID Level	20
Selecting Disk Drives	20
Disk Drives for Your Controller	20
Selecting Cables	20
SATA Cables	20
Installation Options	21
Basic Installation Steps	21
Installing with an Operating System	21
Installing on an Existing Operating System	21
Installing the HostRAID Controller and Disk Drives	22
Before You Begin	23
Installing the HostRAID Controller	23
Connecting Disk Drives to SATA HostRAID Controllers	24
Checking Your Controller and Devices	24
Determining the Boot Controller	24
Next Steps	24
Creating a Bootable Array	25
Setting the Boot Controller	26
Creating an Array	26
Creating an Array with the ACU	26
Creating an Array with Adaptec Storage Manager	27
Making Your Array Bootable	28
Installing the Driver and an Operating System	29
Before You Begin	30
Creating a Driver Disk	30
Installing with Windows	30
Installing with Red Hat Linux	31
Installing with SUSE Linux	31
Installing with NetWare	32
Installing the Driver on an Existing Operating System	33
Before You Begin	34
Creating a Driver Disk	34
Installing on Windows	34
Installing on Red Hat or SUSE Linux	35
Installing on NetWare	35
Managing Your Storage Space	36
About Adaptec Storage Manager	37
Installing Adaptec Storage Manager	37
About the HRCONF Command Line Utility	37
About the ARC Utility	38
About the AFU	38
Which Utility Should I Use?	38
Understanding Adaptec Storage Manager	39
Features	40
Overview	40
Physical Devices View	41
Logical Devices View	41
Changing How Drives are Displayed	41
Collapsed and Expanded Views	42
Component Views	43
Solving Problems	44
Troubleshooting Checklist	45
Recovering from a Disk Drive Failure	45
Failed Disk Drive Protected by a Hot Spare	45
Failed Disk Drive Not Protected by a Hot Spare	46
Failure in Multiple Arrays Simultaneously	46
Disk Drive Failure in a RAID 0 Array	46
Multiple Failures in the Same Array	46
Understanding RAID	47
RAID Technology Overview	48
Understanding Drive Segments	48
Stripe-unit Size	48
Selecting a RAID Level and Tuning Performance	48
RAID 0 (Non-RAID Arrays)	49
RAID 1 Arrays	50
RAID 10 Arrays	50
Using the ARC Utility	51
Introduction to the ARC Utility	52
Running the ARC Utility	52
Creating and Managing Arrays	52
Creating a New Array	52
Managing Arrays	54
Adding/Deleting Hotspares	56
Managing Bootable Arrays and Devices	56
Configuring Disk Drives	56
ATAPI Support	57
Using SATASelect	57
SATASelect Options	58
Formatting and Verifying Disk Drives	59
Using the AFU for DOS	60
Introduction	61
System Requirements	61
Compatibility	61
Running the AFU from the GUI	62
Running the AFU from the Command Line	62
HELP	62
LIST	62
SAVE	63
UPDATE	64
VERIFY	64
VERSION	65
Command Switches	65
AFU Command Line - Step-by-Step	65
Safety Information	67
Electrostatic Discharge (ESD)	67
Technical Specifications	68
Environmental Specifications	69
DC Power Requirements	69
Current Requirements	69
Glossary	70

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Understanding RAID

In this chapter...

RAID Technology Overview

..................................................................................................

RAID 0 (Non-RAID Arrays)

..................................................................................................

RAID 1 Arrays

........................................................................................................................

RAID 10 Arrays

......................................................................................................................

When you create arrays (or logical drives), you can assign a RAID level to protect your data.

Each RAID level offers a unique combination of performance and redundancy. RAID levels

also vary by the number of disk drives they support.

This appendix describes the RAID levels supported by your HostRAID controller, and provides

a basic overview of each to help you select the best level of protection for your data storage.