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) ** Attachment added: "log.txt" https://bugs.launchpad.net/ubuntu/+source/linux-hwe/+bug/1713029/+attachment/4956575/+files/log.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1713029 Title: Statistics of IO using is incorrect To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-hwe/+bug/1713029/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs