Comment 495 for bug 59695

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Dennis Noordsij (dennis-noordsij) wrote :

Milo: it just means your disks default settings do not trigger within the 5 seconds of the forced flush. This is purely coincidental and nothing to do with "broken" disks.

It is also the reason so many people see so many different results, depending on your drive's settings you may never see it, or you may see 12 parks per minute.

BUT, this in no way invalidates that it does not make any sense to have any APM when not using laptop_mode, and that it is the cause for the load cycle count increases.

Dan: if APM is 255/254 it should be fixed, but for example on my standard Hardy (with backports) it is re-set to 128 on resume-from-suspend, and goes clickity-click.

If a drive "wakes up" with a different setting than it went to sleep with, fair enough that is stupid on the drives part, but, like many other devices which get reinitialized, the OS should make sure the driver is in the correct state (no APM if it wasn't set before), and that just brings us back to the main issue: no APM when not in laptop_mode