Chapter 3

RAID Levels

This chapter describes each supported RAID level and the factors to consider when choosing a RAID level. It contains the following sections:

￿Section 3.1, “Selecting a RAID Level”

￿Section 3.2, “RAID 0”

￿Section 3.3, “RAID 1”

￿Section 3.4, “RAID 5”

￿Section 3.5, “RAID 10”

￿Section 3.6, “RAID 50”

3.1Selecting a RAID Level

To ensure the best performance, you should select the optimal RAID level when you create a system drive. The optimal RAID level for your disk array depends on a number of factors:

￿The number of drives in the disk array

￿The capacity of the drives in the array

￿The need for data redundancy

￿The disk performance requirements

Note: The SCSI 320-0 controller supports a maximum of 15 physical drives.

MegaRAID SCSI 320-0 Hardware Guide

3-1

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