* Re: [gentoo-user] hdparm and write caching
@ 2011-03-28 8:35 99% ` Mick
0 siblings, 0 replies; 1+ results
From: Mick @ 2011-03-28 8:35 UTC (permalink / raw
To: gentoo-user
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On Monday 28 March 2011 09:11:51 Coert Waagmeester wrote:
> Hello all,
>
> Running a box with 2x1TB software raid disks.
> A while back I read up about disk write caching and it's pros/cons.
>
> I then decided to disable it on my box.
> Edited /etc/conf.d/hdparm and added -W0 for sata_all_args.
> And added it to the default runlevel.
>
> It works, on bootup it turns off write caching.
> But a while later when KDE is up and running and I check with hdparm -W
> /dev/sd? write caching is on again.
>
> Now, I have two questions,
> How can I find out what turned it back on, and how can I prevent it?
>
> Is it necessary/prudent to turn it off in the first place?
>
> At the moment I run a cron job that checks every 10 minutes and turns it
> off if it is enabled. But that feels like a somewhat ugly solution...
Try touch /etc/pm/power.d/harddrive to see if it works. Also read this thread
and the bugs mentioned in there:
http://thread.gmane.org/gmane.linux.gentoo.user/232788/focus=233098
--
Regards,
Mick
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2011-03-28 8:11 [gentoo-user] hdparm and write caching Coert Waagmeester
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