Re: HD performance question

[Derek Gladding <derek_gladding@altavista.net>]

On Monday 18 November 2002 02:28 am, Olaf Meeuwissen wrote:
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> Dear .debs,
>
> I'm a minimalist and rolled my own kernel.  It was absolutely bare
> bones and that had a noticable effect on hard disk performance.  So I
> tinkered around a bit with kernel options and tested performance with
> hdparm -tT.  Now I'd like to know what all those numbers mean and if
> they are reasonable (for my Dynabook SS S4/275PNHW).
>
> I've repeated all tests five times and dropped outliers.  With my
> initial kernel I get
>
>   ~110 MB/sec for buffer-cache reads
>   ~  2 MB/sec for buffered disk reads
>
> After tinkering I get
>
>   ~ 55 MB/sec for buffer-cache reads
>   ~ 14 MB/sec for buffered disk reads
>
> Question 1: Which of the two is "better" and why?
> Question 2: Can I do better than this?

Maybe. What does "hdparm /dev/hda" return ?

- Derek