# fio -ioengine=libaio -direct=1 -name=test -bs=4k -iodepth=1 -rw=randwrite -filename=/dev/vdb -size=200G -runtime=6000
test: (g=0): rw=randwrite, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=libaio, iodepth=1
fio-3.1
Starting 1 process
Jobs: 1 (f=1): [w(1)][0.4%][r=0KiB/s,w=48KiB/s][r=0,w=12 IOPS][eta 01h:39m:39s]
Ох как люблю такую хню... на ребалансе.