[Bug 607560] Re: jbd2 writing block every 5 - 10 seconds, preventing disk spin-down and making noise

[Per Wahlström]

Seems to be the ext4 journaling doing its thing. You can increase the
interval (in seconds) by adding for example

  commit=60

to mount-options in /etc/fstab, or disable it altogether with

  tune2fs -O ^has_journal /dev/sda5
  e2fsck -f /dev/sda5

(or whatever your disk is called). Your disk will be more vulnerable for
data corruption on uncontrolled shut-downs without journaling.

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jbd2 writing block every 5 - 10 seconds, preventing disk spin-down and making noise
https://bugs.launchpad.net/bugs/607560
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