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Understanding RAID

In this appendix...

Understanding Drive Segments............................................................................................. 96

Non-redundant Arrays (RAID 0) .......................................................................................... 96

RAID 1 Arrays ........................................................................................................................ 97

RAID 1 Enhanced Arrays ....................................................................................................... 97

RAID 10 Arrays ...................................................................................................................... 98

RAID 5 Arrays ........................................................................................................................ 99

RAID 5EE Arrays.................................................................................................................. 100

RAID 50 Arrays .................................................................................................................... 101

RAID 6 Arrays ...................................................................................................................... 102

RAID 60 Arrays .................................................................................................................... 102

Selecting the Best RAID Level.............................................................................................. 103

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 Adaptec RAID controller, and
provides a basic overview of each to help you select the best level of protection for your data
storage.