Adaptec 7220ss Guía Del Usuario

A-12

Storage Concepts

Figure A-6 RAID 5 set

Applications Suitable for RAID 5 Sets

These types of applications are suitable for RAID 5 sets:

■

Transaction read requests are high.

■

Data availability is worth protecting, but the cost of mirroring
would excessive.

■

Writes are a small percentage of the I/O load, such as inquiry
type transaction processing, group office automation, and online
customer service departments.

*P = Parity

Partition A1
4 GB
Chunks
1,P*,7,10,13...

Partition A2
4 GB
Chunks
2,4,P*,11,14...

Partition A3
4 GB
Chunks
3,5,8,P*,15...

Free Space

Partition A4
4 GB
Chunks
P*,6,9,12,P*...

RAID 5 Set A
12 GB
Chunks 1,2,3,4,5,6,7,8,
9,10,11,12,13,14,15...

Drive 1

Drive 2

Drive 3

Drive 4