Re: ata: printf on every spinup/spindown?

on 17/03/2009 14:29 Garrett Cooper said the following:
> 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!

For nothing? :-) phk is the author of the for this feature.


-- 
Andriy Gapon