What's the best filesystem battery-wise for laptops?

[Kevin O'Gorman]

You also want to look for processes or cron jobs that hit the disk on a regular
basis.  For many distros, there's a statistics gathering thing  that runs
hourly (but leaves a daemon that comes alive every 10 minutes or so).
This is a frequent culprit.

++ kevin


On Fri, May 24, 2002 at 08:56:20PM -0700, Net Llama! wrote:
> Bob Raymond wrote:
> > This question may have been asked before, and I apologize if it has, but
> > my friend has a problem with battery life on his laptop.  He only gets 
> > about
> > fifty minutes to an hour in Linux, while in WindeXP, it's more like two
> > hours.  One thing I notice in Linux is that there's a lot more HD useage
> > going on.  Could this be because of the ReiserFS that's on there now?
> 
> More likely because his system isn't properly tuned, or he's doing 
> things that are I/O intensive.  I've give 512MB of swap, other wise, 
> he's going to use up all the physical memory & swap, and then the system 
> is going to grind to a hault, as it keeps paging in & out of memory.
> 
> > 
> > He's coming over Sunday so I can install SuSE 8.0 (to replace 7.3) and I
> > noticed XFS is one of the options.  I know from personal experience that
> > it is faster than ReiserFS, but how good is it on the batteries, or is
> > the filesystem even the problem?
> 
> The filesystem has little to no effect.  I'd wager good money that 
> windozeXP is not spinning up his HD to 5400rpm, and is halving his CPU 
> clock speed in order to save power.  apm can definitely help with this 
> stuff in Linux (as could the BIOS, possibly), however the question comes 
> down to whether he wants performance or battery life.
> 
> Something else to consider is his kernel, which i really doubt was 
> optimized for a mobile system, or his CPU.
> 
> > 
> >
> > 
> > specs:
> > 
> > Sager NP5620
> > Intel P4 1.8ghz
> > ATI Mobility Radeon 7500
> > 30GB 5400 RPM HD,
> > Part. table:
> > 
> > 8mb /boot /dev/hda1
> 
> That's a wee bit small.  I'd give it at least 15MB.
> 
> 
> > 15GB (approx). / /dev/hda2
> > 256mb (approx). swap /dev/hda3
> > 14GB (approx). /windoze/C /dev/hda3
> > 
> > 256mb PC2100 DDR
> 
> -- 
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> L. Friedman                       	       netllama at linux-sxs.org
> Linux Step-by-step & TyGeMo: 		    http://netllama.ipfox.com
> 
>    8:50pm  up 36 days,  3:43,  3 users,  load average: 0.27, 0.23, 0.37
> 
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-- 
Kevin O'Gorman  (805) 650-6274  mailto:kevin at kosmanor.com
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