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14.1.2.2
25016582Restore
25016582Save
*SAVF
2757 IOA
1228341Restore
1228341Save
*SAVF
45 Units30 Units15 Units2778 IOA
Number of 35 GB DASD units (Measurement numbers in GB/HR)IOA and operation
This restrictive test is intended to show the effect of the 2757 IOAs in a backup and recovery
environment. The save and restore operations to *SAVF (save files) were done on the same set
of DASD, meaning we were reading from and writing to the same 15, 30, and 45 DASD units at
the same time. So the number of I/O DASD operations are double when saving to *SAVF.
This was not meant to show what can be expected from a backup environment, see chapter 15
for save and restore device information.
IBM i 6.1 Performance Capabilities Reference - January/April/October 2008
© Copyright IBM Corp. 2008 Chapter 14 DASD Performance 193
0 500 1000 1500 2000
Ops/Sec
0
10
20
30
40
50
DASD Response Time (MS)
2778/6718 10K RPM
2778/6719 10K RPM
2757/6718 10K RPM
2757/6719 10K RPM
2757/4326 15K RPM
2757/4327 15K RPM
2757/4328 15K RPM
I/O Intensive Workload
2778 IOA vs 2757 IOA 15 RAID DASD