I don't mean to be argumentative but can you quantify any of those
changes? I'm somebody who lives and breathes disk drives, I can tell
you how they work down to fairly detailed levels, and while it is true
that the performance has changed, it is not true that the performance
curves have changed as far as I know.
In other words, the ratio of a 1/4 stroke seek over a 3/4 stroke seek has
stayed constant. The S shaped curve of seek performance as a function of
distance hasn't changed in years, probably hasn't changed substantially
since the day that they made it so that the head would settle on just
the right track.
: I once implemented "closest seek" and "2way-elevators" for
: the Linux IDE driver, and saw marked response improvements
: under heavy load.
Could you quantify that? Do you remember what was the load generator
and what was the difference in response time and what was the difference
in throughput? I'm not trying to argue, I'm just curious as to the
ballpark results. I can imagine that this is all in some dusty corner
of your mind but if you can take a swag at the numbers I'd be interested.
Thanks,
--lm
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/