Adaptec ASR-2120S User's Guide download pdf (Page 11)

1-5

Introduction

RAID-10

A RAID-10 is an example of a dual-level array and is created by

using two or more equal-sized RAID-1s to create a RAID-0.

The top level RAID-0 shares the load among the second level

RAID-1s, improving both read and write performance. Since

second level arrays are RAID-1, only half the total capacity of the

drives in the array is available.

RAID-10

Data 1

Data 3

Data 5

Data 7

Drive

Data 1

Data 3

Data 5

Data 7

Drive

Data 0

Data 2

Data 4

Data 6

Drive

Data 0

Data 2

Data 4

Data 6

Drive

Data 0

Data 2

Data 4

Data 6

RAID-1

Data 1

Data 3

Data 5

Data 7

RAID-1

Top-Level Arrays

Second-Level Arrays

UG.book Page 5 Saturday, October 26, 2002 12:08 PM

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 127 128

Adaptec SCSI RAID 1
2120S/2200S 1
Copyright 2
Trademarks 2
Disclaimer 2
Contents 3
A Glossary 6
Supported RAID Types 8
Introduction 11
Simple Volume 12
Spanned Volume 12
Features 13
Drive Enclosures 14
Hot Spares 14
SCSI Devices Supported 15
Supported Controllers 15
Using Adaptec RAID 17
Configuration 17
Managing Arrays 18
Using the SCSISelect Utility 26
4 Select SCSI Configuration 29
Using the Disk Utilities 31
Viewing the Event Log 32
Adaptec Storage Manager 33
Browser Edition 33
About Adaptec Storage Manager 34
3 Click Login 36
Pop Up Tool Tips 40
Physical Devices 40
■ Capacity of the drive 42
■ SCSI drive ID 42
Logical Devices 43
Creating Arrays 44
Advanced Options 45
Deleting Arrays 49
Modifying Arrays 49
User Interface Options 51
Viewing Events 52
Applying Changes 53
Controller Properties 53
Channel Properties 55
Physical Device Properties 55
Enclosure Properties 57
Logical Device Properties 58
Viewing and Creating Tasks 59
New Tasks Tab 60
■ Critical 61
■ Warning 61
■ Informational 61
Table 3-2 Switches 62
Using the Command Line 67
Interface 67
Terminology 69
Using the CLI 70
Enabling Spares 74
Displaying Disk Information 77
Example of disk list: 78
Example of disk show defects: 78
Example of disk verify: 78
Displaying Array Information 79
Example of container list: 81
The CLI Commands 82
Parameters 83
Switches 83
Container (Array) Commands 84
Controller Commands 95
Diagnostic Commands 98
Disk Commands 100
Logfile Commands 104
Task Commands 105
Enclosure Commands 106
CLI command script: 110
Glossary 111
Adaptec, Inc 128
691 South Milpitas Boulevard 128
Milpitas, CA 95035 USA 128

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Adaptec ASR-2120S User's Guide Page 11

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