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The POWER6 520 and 550 also have an external SAS port, that is controlled by the 57B8/57B7,
used to connect a single #5886 - EXP 12S SAS Disk Drawer which can contain up to 12 SAS
DASD. Below is a chart showing the addition of the #5886 - EXP 12S SAS Disk Drawer.
IBM i 6.1 Performance Capabilities Reference - January/April/October 2008
© Copyright IBM Corp. 2008 Chapter 14 DASD Performance 211
0
0.05
0.1
0.15
0.2
0.25
0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000
POWER6 520 57B8/57B7 6 RAID5 DASD in CEC 12 RAID5 DASD in EXP 12S SAS Disk Drawer
POWER6 520 57B8/57B7 6 RAID5 DASD in CEC
Workload Throughput
System Response Time (sec
)
0
2
4
6
8
10
0 1,000 2,000 3,000
POWER6 520 57B8/57B7 6 RAID5 DASD in CEC 12 RAID5 DASD in EXP 12S SAS Disk Drawer
POWER6 520 57B8/57B7 6 RAID5 DASD in CEC
Ops/Sec
DASD Response Time
(MS)