Re: best base / worst case RAID 5,6 write speeds

Phil, the 16k chunk size has really given a boost to my RAID 5
sequential write performance measured with fio, bs=1408k.

This is what I was getting with a 128k chunk size:

iodepth=4 => 605 MB/s
iodepth=8 => 589 MB/s
iodepth=16 => 634 MB/s
iodepth=32 => 635 MB/s

But this is what I'm getting with a 16k chunk size:

iodepth=4 => 825 MB/s
iodepth=8 => 810 MB/s
iodepth=16 => 851 MB/s
iodepth=32 => 866 MB/s