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14.2.2 RAID Hot Spare
For the following test, the IO workload was setup to run for 14 hours. About 5 hours after
starting A DASD was pulled from the configurations. This forced a RAID set rebuild.
IBM i 6.1 Performance Capabilities Reference - January/April/October 2008
© Copyright IBM Corp. 2008 Chapter 14 DASD Performance 206
0.02
0.05
0.08
0.11
0.14
5000 6000 7000 8000 9000 10000 11000 12000 13000
9406-570 4 way 24 4328 140 GB RAID5 24 active
9406-570 4 way 24 4328 140 GB RAID5 22 active 2 Hot Spares
9406-570 4 way 24 4328 140 GB RAID6 24 active
9406-570 4 way 24 4328 140 GB RAID6 22 active 2 Hot Spares
Workload Throughput
System Response Time (sec)
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
24681012
570 4 way 24 4328 140 GB DASD RAID5 2 Hot Spares
Runtime in Hours
System Response Time (sec)