[DRBD-user] The need for speed

Greg Freemyer greg.freemyer at gmail.com
Fri Nov 19 15:24:36 CET 2004


On Fri, 19 Nov 2004 12:33:36 +0100, Philipp Reisner
<philipp.reisner at linbit.com> wrote:

> 
> Assumption: Maybe because the mirrored partition is behind the
>             root partition, and harddisk are slower on the outer
>             cylinders than on the inner cylinders.
> 

I do a lot of dd if=/dev/hda of=/dev/hdc type of disk duplicating.

Using iostat -d to monitor the disk speed, I definately see a drop off
in speed during the process.   I have assumed like you that disks are
slower on the outer cylinders.

Greg



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