Re: power management

Jason Mangiafico wrote:

>==== Brian Wilson <[email protected]> Wrote:
>  
>
>>>Does anyone know where I can get a Linux distro that has good power
>>>management?  .....or otherwise show me how to get redhat to let the
>>>processor cool down, and spindown the hard drive?
>>>      
>>>
>>Been fighting with the drive spindown on my laptop for years.
>>"Spin down! Now!!! Out out damn spot!"
>>
>>Finally ran it in Win98 for a few days and discovered
>>it's just as bad (or worse). Some sneaky thing in BIOS spins
>>up my drive. I gave up on it.
>>
>>Anyway --
>>
>>Search for tips on running Linux on laptops,
>>they will tell you all about things like using hdparm to set the
>>spindown time and noflushd and things like that.
>>
>>Here's a place to start
>>
>>http://www.ibiblio.org/pub/Linux/docs/HOWTO/other-formats/html_single/Lapto
>>    
>>
>p-HOWTO.html#ss19.7
>  
>
>>On Redhat, change the line in /etc/sysconfig/harddisks from
>>	EXTRA_PARAMS=
>>to
>>	EXTRA_PARAMS="-S 255"
>>for instance to set spindown to 21 minutes -- read the hdparm manpage
>>
>>
>>Brian
>>    
>>
>
>
>I can't get it to spindown that way, either.  Redhat is frequently writing
>to disk, preventing it from spinning down.
>
>It would be great if I could stop flushing and syncing of disk buffers, but
>instead just don't buffer them at all; just write to disk immediately.  
>
>Other things I fooled around with are:
>
>noflushd - didn't seem to work.  something else was writing to the drive
>anyway, keeping it spun up.
>
>Logging daemon -  Couldn't get an improvement.
>
>bios power management - had no effect
>
>
>In the Openbrick, the processor feels like it's about to burn up all the
>time.  Once I get the HDD to spin down, the next thing is the processor, how
>to make it run cooler in Reshat?
>
>I fooled around in bios. With CPU throttling after 4 sec. of idle time, it's
>slightly cooler, but not much.  Seems as Redhat is keeping it hot much of
>the time.
>
>
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>  
>
try
noflushd - allow idle hard disks to spin down
 /usr/sbin/noflushd -n 2 /dev/hda
this may help you for the frequent writes
and
acpid - Utilities for using ACPI power management

-chris