Load_Cycle_Count and ATA APM

Søren Schmidt sos at deepcore.dk
Tue Feb 5 21:10:56 UTC 2008

Hi all!

Talk to phk, I discussed the "right" way of doing things with him a  
few month back and I think he did at least a proof of concept thing on  
it, dunno how far it got. Maybe it could be used as a starting ground  
for a proper solution.

I dont have much time (still) but maybe I could find time to finish  
up / overhaul a part solution as mentioned above....


On 5Feb, 2008, at 22:06 , Bruce Cran wrote:

> Kostik Belousov wrote:
>> [Replying to the original list of the recipients].
>> On Tue, Feb 05, 2008 at 05:36:57PM +0100, Alexander Leidinger wrote:
>>> Quoting Kostik Belousov <kostikbel at gmail.com> (from Tue, 5 Feb  
>>> 2008  15:02:10 +0200):
>>>> I noted that when idle, my laptop HDD increases the  
>>>> Load_Cycle_Count
>>>> (193) approx. each ten seconds, as reported by smartctl. Have  
>>>> recently
>>>> read about the Ubuntu and APM mode for hard drives, I searched  
>>>> for the
>>>> tool to tune APM (that has functionality similar to linux' hdparm  
>>>> -B).
>>>> It seems that FreeBSD does not have a tool ? Am I wrong ? In case  
>>>> I did
>>>> not make a mistake, below is the patch that allows to manage APM  
>>>> state
>>>> of the hard drive using atacontrol.
>>> Any chance to also handle automatic acoustic management at the  
>>> same time?
>> http://people.freebsd.org/~kib/misc/ata_setcap.2.patch
> The PR bin/81692 also has a patch to add APM and AAM functionality  
> to atacontrol on FreeBSD 6.
> --
> Bruce

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