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SubjectRe: Cheetah vs. UDMA: Bonnie says UDMA is faster! why?


> Seagate Cheetah (10K RPM UW-20):
>
> -------Sequential Output-------- ---Sequential Input-- --Random--
> -Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---
> Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU
> 100 2134 94.7 6018 78.1 3199 70.5 2361 90.8 9999 89.6 140.9 17.2

Well, something is definitely wrong with your setup, hw or sw.
What kind of SCSI controller are you using?
Here are results for my Cheetah, old model, UW, 20 Mhz and BusLogic 958 -
and i think you can get even more from Cheetah.A
System has 128M of RAM, hence -s 256.

-------Sequential Output-------- ---Sequential Input-- --Random--
-Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---
Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU
256 8571 93.2 12741 50.6 4594 29.8 9925 73.6 13321 20.5 106.7 2.1


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