Janek Kozicki wrote:

Michael Tokarev said: (by the date of Fri, 21 Dec 2007 14:53:38 +0300)

quoted

quoted

I just noticed that with Linux software RAID10, disk
usage isn't equal at all, that is, most reads are
done from the first part of mirror(s) only.

what's your kernel version? I recall that recently there have been
some works regarding load balancing.

It was in my original email:

The kernel is 2.6.23 but very similar behavior is
shown by earlier kernels as well.  Raid10 stripe
size is 256Mb, but again it doesn't really matter
other sizes behave the same here.

Strange I missed the new raid10 development you
mentioned (I follow linux-raid quite closely).
Lemme see...  no, nothing relevant in 2.6.24-rc5
(compared with 2.6.23), at least git doesn't show
anything interesting.  What change(s) you're
referring to?

Thanks.

/mjt