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I have /dev/sdb as a storage drive. (used very rarely) I would like to use TLP or hdparm to power it off when not used to save power. However when I monitor disk's activity with watch iostat -d /dev/sdb i see something constantly writing into the disk. With iotop I can see jbd2/sdb2-8 running all the time. How could I disable this?

I've added noatime option to /etc/fstab.

The problem starts immediatly after I reboot. IO percentage of jbd2/sdb2-8 is less than 0,05. The only problem is that because it is writing some small amounts of data, tlp won't power the HDD off.

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    Possible duplicate of jbd2 constantly writing to disk
    – Thomas Ward ♦
    Mar 2, 2016 at 14:20
  • For me usage is only <0,05 %. Also in my case, it starts immediatly after reboot.
    – Aku506
    Mar 2, 2016 at 14:50
  • im having problems with it as well. at the very least, jbd2 should have a man page. it is confusing as to what it is doing, why, how, etc.
    – don bright
    Oct 30, 2016 at 16:18

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