Adaptec 7220ss User Guide

A-15

Storage Concepts

Figure A-8 Stripe set of RAID 5 sets

The stripe set of RAID 5 sets is the top-level array, and RAID 5 sets
A and B are the underlying arrays.

Applications Suitable for RAID 0/5 Sets

The following types of applications benefit from the improved I/O
request handling and high data transfer performance of RAID 0/5
sets:

■

Any application whose data which must be highly available and
whose volume, cost constraints, and I/O performance
requirements (high data transfer rate) indicate multiple parity
arrays as the basic storage technology.

Partition A

Partition B

Partition C

RAID 5 Set A
8 GB

16 GB

Stripe Set of RAID 5 Sets

Chunks

Chunks 1,3,5,7...

RAID 5 Set B
8 GB
Chunks 2,4,6,8...

Drive 1

Partition C

Drive 2

Drive 3

Drive 4

Drive 5

Drive 6

1,2,3,4,5,6,7,8,9...

4 GB

Free Space

*P = Parity

Chunks

1,7,P*,13...

P*,6,12,P*...

4,P*,10,16...

2,8,P*,14...

P*,5,11,P*...

3,P*,9,15...