James Carlson wrote:
> Terry Whatley writes:
>
>> The IO framework and driver stack will be enhanced to provide generic
>> support of modern disks' power management capabilities. The new
>> features include support of SPC-4/SBC-3 compliant disk power conditions.
>> The SATA framework will be enhanced to provide comparable software
>> translation between ATA power conditions and SBC-3 power conditions.
>>
>
> Where's the rest of this project? I would expect that, in order to
> finish this project, there's some work necessary to make the power
> management subsystem consume this data. That doesn't appear to be a
> part of this project, though.
>
> Are the folks responsible for supporting autopm and the rest of the
> power management subsystem involved with this project?
>
> If not, are they aware of what this project is planning to deliver,
> and do they agree that the information will be usable to make power
> management decisions?
>
> If so, is there a future project ("autopm disk enhancements") that is
> dependent on this one?
>
> Help us to connect the dots from the set of low-level driver
> properties described here to the higher-level goal of providing better
> disk management.
>
>
Terry,
Isn't ZFS the primary consumer of these new PM-related disk driver
properties [interfaces] at present?
Is there a design document that describes these new conceptions for
storage-related power management? Seems like that would help provide
the context whereby folks could understand this a bit better.
It would also be very useful to have that around in the case's materials
directory for anyone who came there later, wishing to learn about this.
-db
--
; David J. Brown Ph.D. (cantab.)
; Solaris Engineering
; Sun Microsystems Inc.
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