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  Harddisk Roundup, Heat, Noise and Performance 
  Oct 01, 2002, 07:30am EDT 

Test Results, HDtach

By: Sander Sassen

If we look at the HDtach results one thing is obvious, the 5400-rpm harddisks are no match for any of the 7200-rpm harddisks. The difference between the fastest and slowest disk in this roundup is a massive 64% (40618/24755). If we however look at the scores for 5400 and 7200-rpm averaged, the 7200-rpm harddisks are on average 31% (38513/29339) faster. A clear-cut conclusion you might think, 7200-rpm harddisks are faster, period. Unfortunately we couldn’t be further from the truth. HDtach is a sequential benchmark and as such is useless if you’re looking for real-world results. It simply measures the maximum throughput in Kb/s across the platters, working from the outside in. In a real-world situation the harddisk will never read or write data from/to the platters sequentially but rather scatter the data all over the platters. Nevertheless HDtach gives a good indication of what the harddisk is capable of; a good reference to compare to the real-world benchmarks.

1. Introduction
2. Noise Production
3. Heat Production
4. Harddisk Applications
5. Testing and Methodology
6. Test Results, HDtach
7. Test Results, PCmark2002
8. Test Results, Sandra 2002
9. Test Results, Noise Production
10. Test Results, Heat Production
11. Conclusion

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