Intel 7xx Servers, 170 Servers, AS/400 RISC Server manual RAID Hot Spare

14.2.2 RAID Hot Spare

		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
(sec)		9406-570 4 way 24 4328 140 GB RAID6 22 active 2 Hot Spares
	0.14
Time
	0.11
Response
	0.08
System	0.05
	0.02
	5000	6000	7000	8000	9000	10000	11000	12000	13000
				Workload Throughput

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.

System Response Time (sec)

570 4 way 24 4328 140 GB DASD RAID5 2 Hot Spares

1.8

1.6

1.4

1.2

1

0.8

0.6

0.4

0.2

0

2	4	6	8	10	12
		Runtime in Hours

IBM i 6.1 Performance Capabilities Reference - January/April/October 2008
© Copyright IBM Corp. 2008	Chapter 14 DASD Performance	206