ionice vs. Software-RAID
Solution 1:
Chris Siebenmann recently came to the same conclusion as you: ionice has no effect on either "software raid" (I presume this means MD) or LVM.
http://utcc.utoronto.ca/~cks/space/blog/
Chris Siebenmann recently came to the same conclusion as you: ionice has no effect on either "software raid" (I presume this means MD) or LVM.
http://utcc.utoronto.ca/~cks/space/blog/