Chapter 2
RAID Overview
Start
Data Protection
(Redundancy)
Required?
No
Yes
Complete
RAID 0
Duplication
Required?
Yes
No
Number of
Number of
Disk Drives
Disk Drives?
2
4 or more
3 or more
6 or more
Disks
Disks
Disks
Disks
RAID 1
RAID 10
RAID 5
RAID 50
Figure 2-4. Decision Tree for Choosing a RAID Level
21