Intel 7xx Servers, 170 Servers, AS/400 RISC Server manual 14.3.3 572A IOA

14.3.3 572A IOA

The 572A IOA is a SAS IOA that is mainly used for SAS tape attachment but the 5886 EXP 12S SAS Disk Drawer can also be attached.

Performance will be poor as the IOA does not have any cache.

The following charts help to show the performance characteristics that resulted during experiments in the Rochester lab.

If storage space is all that is needed then the 5886 EXP 12S SAS Disk Drawer could be an option

9406 MMA 4 Way 571F w ith 24 RAID5 DASD in a 5786 EXP24 Disk Draw er

9406 MMA 4 Way 572A w ith 24 Mirrored DASD in 5886 EXP12S SAS Disk Draw ers

9406 p5 570 4 Way 2780 IOA 15 RAID5 DASD

(ms)	0.2
Time	0.15
Response	0.1
	0.05
System	0
	0	2000	4000	6000	8000	10000	12000	14000

DASD/IO Workload Throughput

9406 MMA 4 Way 571F w ith 24 RAID5 DASD in a 5786 EXP24 Disk Draw er

9406 MMA 4 Way 572A w ith 24 Mirrored DASD in 5886 EXP12S SAS Disk Draw ers

9406 p5 570 4 Way 2780 IOA 15 RAID5 DASD

		35
Dasd Response		30
	Time (ms)	25
		20
		15
		10
		5
		0
		0	500	1,000	1,500	2,000	2,500	3,000	3,500
						Ops/sec

IBM i 6.1 Performance Capabilities Reference - January/April/October 2008
© Copyright IBM Corp. 2008	Chapter 14 DASD Performance	212