I can hear my hard disk reading or writing for long periods of time (20+ seconds) at some time after monitors are shut down due to inactivity.
Sometimes it's not just when I am away.
How do I find out what's writing to the disk and how to stop it?
I have tried with iotop but activity stops by the time monitors turn on and I type sudo iotop. And even when it continues, iotop doesn't really report much, it's as if it doesn't catch most of it.
I have a few partitions that are on windows NTFS. Maybe iotop doesn't work on windows NTFS?