Re: ata: printf on every spinup/spindown?

From: Garrett Cooper <yanefbsd_at_gmail.com>
Date: Tue, 17 Mar 2009 05:29:15 -0700
On Tue, Mar 17, 2009 at 5:28 AM, Garrett Cooper <yanefbsd_at_gmail.com> wrote:
> On Mon, Mar 16, 2009 at 1:19 PM, army.of.root
> <army.of.root_at_googlemail.com> wrote:
>> Andriy Gapon wrote:
>>>
>>> I am playing with ata spindown feature and I think that it is really
>>> unnecessary
>>> to print a message each time ata driver is going to spindown a disk or let
>>> it be
>>> spinned up:
>>> ad6: Idle, spin down
>>> ad6: request while spun down, starting.
>>> ad6: drive spun down.
>>> ad6: Idle, spin down
>>> ad6: request while spun down, starting.
>>>
>>> Especially this is not useful when "Idle, spin down" messages are going
>>> spin up
>>> the disk via syslog logging to disk :-)
>>>
>>> Maybe put these under verboseboot if not drop entirely?
>>>
>>
>> Hi,
>>
>> yah, I had some unpleasant experience with spinning down disks. That really
>> is only useful for backup disks or similar disks which are not accessed
>> frequently or used by any programs.
>>
>> :) The HDD consumes in Idle mode only something like 1W so it isnt really
>> economic to spin it down.
>
> Spinning down to a lower RPM seems legitimate, compared to spinning it
> down, which kills the drives. Look at WD's green drives -- they claim
> to get 30% ~ 50% better power efficiency than standard drives.
>
> It may not seem like much, but HDD's really kill laptop batteries and
> also really suck up juice in data centers. Any way to reduce energy
> consumption without killing off hardware is really good in my book
> 8-).
>
> Thanks PHK!

Err... Andriy :P!

> -Garrett
Received on Tue Mar 17 2009 - 11:29:15 UTC

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