Adaptec DuraStor 7220SS User Manual page 118

RAID 5 Set A
8 GB
Chunks 1,3,5,7...
Drive 1 Drive 2
Partition A
Partition B
4 GB
4 GB
Chunks
Chunks
1,7,P*,13...
3,P*,9,15...
*P = Parity
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
I
whose volume, cost constraints, and I/O performance
requirements (high data transfer rate) indicate multiple parity
arrays as the basic storage technology.
Drive 3
Partition C
4 GB
Chunks
Chunks
P*,5,11,P*...
Stripe Set of RAID 5 Sets
16 GB
Chunks
1,2,3,4,5,6,7,8,9...
Drive 4 Drive 5
Partition A Partition B
4 GB 4 GB
Chunks
4,P*,10,16...
2,8,P*,14...
Storage Concepts
RAID 5 Set B
8 GB
Chunks 2,4,6,8...
Drive 6
Partition C
4 GB
Chunks
P*,6,12,P*...
Free Space
A-15