Table of Contents

 

1

Overview...................................................

1

 

Single Ended and Differential SCSI Buses.......................

2

 

Maximum Cable Length for SCSI Standards....................

2

 

Documentation Set............................................................

3

2

Introduction to RAID................................

5

 

RAID Overview................................................................

5

 

RAID Levels.....................................................................

6

 

Consistency Check............................................................

6

 

Fault Tolerance .................................................................

6

 

Disk Striping.....................................................................

7

 

Disk Mirroring..................................................................

8

 

Disk Spanning...................................................................

9

 

Parity...............................................................................

10

 

Hot Spares.......................................................................

11

 

Disk Rebuild ...................................................................

12

 

Logical Drive ..................................................................

13

 

Hot Swap ........................................................................

13

 

SCSI Drive States ...........................................................

13

 

Logical Drive States........................................................

13

 

Disk Array Types............................................................

14

 

Enclosure Management...................................................

14

3

RAID Levels............................................

15

 

Selecting a RAID Level ..................................................

16

 

RAID 0 ...........................................................................

17

 

RAID 1 ...........................................................................

18

 

RAID 3 ...........................................................................

19

 

RAID 5 ...........................................................................

21

 

RAID 10 .........................................................................

22

 

RAID 30 .........................................................................

23

 

RAID 50 .........................................................................

24

4

Features..................................................

25

 

SMART Technology.......................................................

25

 

Configuration on Disk.....................................................

26

 

Hardware Requirements..................................................

26

 

Configuration Features....................................................

26

 

Hardware Architecture Features .....................................

27

 

Array Performance Features ...........................................

27

 

RAID Management Features...........................................

28

 

Fault Tolerance Features.................................................

28

 

Software Utilities ............................................................

28

 

Operating System Software Drivers................................

29

 

MegaRAID Specifications ..............................................

29

 

Components ....................................................................

30

 

Summary.........................................................................

32

Preface iii