HP 418371-B21 - Dual Port 72 GB Hard Drive Technology Brief page 9

Figure 5. Performance comparison: SFF to LFF 15K 72-GB SAS drives with HP Smart Array P800
Controller, RAID 1 (128K)
130%
120%
110%
100%
90%
80%
70%
4KB RANDOM READ 4KB RANDOM WRITE
Level of performance for LFF SAS drives
RAID 1 is a strategy for achieving redundancy rather than enhanced performance. Nevertheless, as
indicated in Figure 5, SFF SAS drives provide better performance than LFF SAS drives for most
RAID 1 configurations.
RAID-1 (128KB)
4KB OLTP 8KB RANDOM READ 8KB RANDOM WRITE 8KB OLTP 64KB RANDOM READ
2 SFF SAS drives
4 SFF SAS rives
6 SFF SAS drives
8 SFF SAS drives
12 SFF SAS drives
IOMETER 07.30.2004
64KB RANDOM WRITE
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