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my question concerns Ubuntu 16.04.

After every boot I can view my folders and files on my HDD as intended. After 1 min of proper usage the file system becomes unresponsive for around 25 seconds. Then it works fine again infinitely.

How can I reach to the source of this issue? Any suggestions?

Just tell me if I should add any more information regarding my setup.

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  • Sounds like an @reboot cronjob to me. Have you tried System Monitor? The Processes tab has various disk columns (r/w). Perhaps you can see there which process does the disk I/O.
    – PerlDuck
    Mar 18, 2018 at 11:19
  • What is the output of dmesg command
    – Prvt_Yadav
    Mar 18, 2018 at 11:20
  • Welcome to Ask Ubuntu! :-) What is the output of sudo smartctl --all /dev/sda If sudo: smartctl: command not found type sudo apt install smartmontools and try again.
    – Fabby
    Mar 18, 2018 at 12:11
  • Thank you all for your quick answers! With the help of @PerlDuck I saw that megasync required a lot of disk space. And this is already the cause for the unresponsiveness: It seems like my cloud sync program has to initialize (check) all corresponding directories. Guess I cannot solve it, I just have to be patient after a boot :)
    – Chris
    Mar 18, 2018 at 12:21
  • You may have a look at ionice. It can throttle a program's I/O greediness so that other processes aren't affected too much.
    – PerlDuck
    Mar 18, 2018 at 13:02

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