Comment 2 for bug 1713029

I've used script
#!/bin/bash

while (true) do
        str=`date`" $(cat /sys/block/sda/stat)"
        echo $str >> log.txt
        sleep 1;
done

Reproduced in:
Linux vm145 4.10.0-35-generic #39~16.04.1-Ubuntu SMP Wed Sep 13 09:02:42 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04.3 LTS
Release: 16.04
Codename: xenia

The difference of numbers of sectors written between line 30 and 29 in log.txt is very big and in gigabytes equal 153Gb/sec

(876330784-554468984)*512/(1024*1024*1024)