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List:       kde-devel
Subject:    Re: PowerManagement changing hard disk settings
From:       Pedro Francisco <pedrogfrancisco () gmail ! com>
Date:       2010-07-30 22:09:24
Message-ID: 201007302309.24465.pedrogfrancisco () gmail ! com
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A Thursday 29 July 2010 20:02:39 Roman Jarosz escreveu:
> Hi,
> 
> when I have switched to KDE 4.5. I've notice that the system lags a lot,
> and after some debugging (and almost going back to 4.4) I found out that
> PowerManagemet is always changing the APM_level of my /dev/sda disk to 1,
> which mostly parks the disk heads cca. every 5 seconds during normal work.
> 
> This is really bad because I have to wait 1-2s till the heads are unparked,
> but what's even worse that I can't find any option how to disable it.
> 
> I would like to ask if I can disable it somewhere, or if I have to hack it
> in code?
> Also IMHO so aggressive power saving shouldn't be forced by default.
> 
> Regards
> Roman

Plus it's bad for the disk health, see the famous and now closed bug «
High frequency of load/unload cycles on some hard disks may shorten lifetime » 
@ https://bugs.launchpad.net/bugs/59695 .
 
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