Ibm I 6.1 Performance Capabilities Reference - January/April/October; Raid5 Vs Raid6 - 10 15K 35Gb Dasd; Iop Vs Iopless - 10 15K 35Gb Dasd - IBM 170 Servers Manual

14.1.3 571B
iV5R4 offers two new options on DASD configuration.
RAID6 which offers improved system protection on supported IOAs.
NOTE: RAID6 is supported under iV5R3 but we have chosen to look at performance data on
a iV5R4 system.
IOPLess operation on supported IOAs.
14.1.3.1 571B RAID5 vs RAID6 - 10 15K 35GB DASD
0.25
0.2
0.15
0.1
0.05
0
0
14.1.3.2 571B IOP vs IOPLESS - 10 15K 35GB DASD
The system CPU % used with and without and IOP was basically the same for the 571B with our
workload tests.
0.25
0.2
0.15
0.1
0.05
0
0

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

©
Copyright IBM Corp. 2008
RAID-5 vs RAID-6 .
571B RAID-5
500 1000
Workload Throughput
IOP vs IOPLess
571B RAID-5 IOP
500 1000
Chapter 14 DASD Performance
571B RAID-6
1500 2000
571B RAID-5 IOPLess
1500 2000
Workload Throughput
2500 3000
2500 3000
3500
3500
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