Intel AS/400 RISC Server User Manual

Page 195

Advertising
background image

14.1.4 571B, 5709, 573D, 5703, 2780 IOA Comparison Chart

In the following two charts we are modeling a System i 520 with a 573D IOA using RAID5,
comparing 3 70GB 15K RPM DASD to 4 70GB 15K RPM DASD. The 520 is capable of
holding up to 8 DASD but many of our smaller customers do not need the storage. The charts
try to point out that there may be performance considerations even when the space isn’t needed.

14.1.4.1

14.1.4.2

IBM i 6.1 Performance Capabilities Reference - January/April/October 2008

©

Copyright IBM Corp. 2008

Chapter 14 DASD Performance

195

0

0.1

0.2

0.3

0.4

0.5

0

200

400

600

800

573D 3 RAID5 DASD

573D 4 RAID5 DASD

Workload Throughput

S

y

s

tem

R

e

s

p

ons

e T

im

e

(

s

e

c

)

0

10

20

30

40

0

100

200

300

400

500

573D 3 RAID5 DASD

573D 4 RAID5 DASD

Ops/Sec

D

A

S

D

R

e

s

p

ons

e T

im

e

(

m

s

)

Advertising
This manual is related to the following products: