Comment 19 for bug 1668557

Thanks maswan for the later logs as discussed.

TL;DR: the kernel now no more knows/considers this as a raid

It now merged write requests: wrqm/s 0 -> ~500
The writes are bigger due to that x8: avgrq-sz ~1000 -> ~8000
But we know it is a raid, it has to split it on stripe size
And we can see x8 in time would be ok, but we see: w_await ~10 -> ~600

I asked on IRC for the following on good/bad case while checking source.
 $ for i in /sys/class/block/sda/queue/iosched/* /sys/class/block/sda/queue/*; do echo $i $(cat $i); done