Re: iozone write 50% regression in kernel 2.6.24-rc1

[Mark Lord]

Peter Zijlstra wrote:
..
> While I see that the write speed as reported under .24 ~70MB/s is much
> lower than the one reported under .23 ~200MB/s, I find it very hard to
> believe my poor single SATA disk could actually do the 200MB/s for
> longer than its cache 8/16 MB (not sure).
>
> vmstat shows that actual IO is done, even though the whole 512MB could
> fit in cache, hence my suspicion that the ~70MB/s is the most realistic
> of the two.
..

Yeah, sequential 70MB/sec is quite realistic for a modern SATA drive.

But significantly faster than that (say, 100MB/sec +) is unlikely at present.
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