RE: [PATCH v6 0/7] ZPODD patches

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> >>> For hard disk runtime power off, Is there (hardware?) requirement for
> > hard
> >>> drive to support similar feature?
> >>
> >> No requirement for hard drive, as it does not need to remote wake up
> >> itself while powered off.
> >>
> >> Please note that there is a v7 sent yesterday, you may want to take a
> >> look at that instead of v6.
> >>
> >> And the runtime power off of hard drive is dropped from that patch set,
> >> I'll submit it in another patch set(pretty small changes needed).
> >>
> >> Thanks,
> >> Aaron
> > [Jack Wang] Thanks Aaron for quick replay, for disk runtime power off,
will
> > it   a different proach from block runtime power management patch set
from
> > Lin Ming?
> 
> I suppose you mean the "block layer runtime pm" from Lin Ming?
> No, they are different things.
> 
> That patch set introduced a mechanism to decide when a device can enter
> runtime suspend based on block layer request, while my patch cares about
> when it is runtime suspended, how to remove its power.
> 
> Thanks,
> Aaron
[Jack Wang] Thanks, but I still not get how to remove hard disk power?
Through acpi? But libata acpi not cover scsi disk right? Sorry if my
question is too stupid.

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