[Alug] Hard Drive performance

Wayne Stallwood wayne.stallwood at btinternet.com
Tue Sep 17 21:51:02 BST 2002


It's also worth considering that a clock for clock comparasion between a PC
and a Laptop will always show the laptop to be slower.

The Processor, Video Hardware, Drives etc are all optimised for power
consumption and size...not speed.

The Mobile P4 operates without a bloody great H/Sink fan and draws less
 power, how do you think it achieves that ?

I'm guessing that you have a 8200, Your Gforce 4 Go graphics chip is
compareable to a GF2 on a desktop system, again due to power and size
considerations.

You could have a tinker with the power management setup, it may be set to
"Battery Economy" rather than "Performance" The Processor in question is
capable of speedstep after all, it may be possible to use the Bogomips value
to determine what speed the clock was actually running at, but this is only
measured during boot AFAIK.

In short

Don't expect your laptop to ever perform as well as a 1.6 Ghz desktop system,
although that said slower than a 1Ghz does sound a little off, check those
power settings.

W

> > On Mon, Sep 16, 2002 at 10:44:33PM +0100, Ian Bell wrote:
> > > I mentioned in an earlier post my move from a P!! igig PC to a new dell
> > > laptop with a P4 1.6 gig and how with rh7.3 it seemed slower than the
> > > old system.  I have now investigated this a little further.
> >
> > One other factor here i think you are saying a PIII 1Ghz to a PIV 1.6Ghz?
> > in which case the performance would not be 60% greater, in all likelyhood
> > a PIV at 1.6ghz will most likely be the same speed as a PIII 1Ghz for
> > most of the time, slower for some things and faster on a very few others.
> >
> > Have you also checked memory timings in the Bios? is the kernel built
> > with support for a PIV, are you using a framebuffer driver for X or
> > native GFX support? Are there many unused daemons running in the
> > background that you don't need? are all other things to check.
> >
> > About hdparm, PIO modes are usually discovered by the BIOS pretty
> > accuratly so I would leave them alone, setting DMA to 16bit or 32bit with
> > sync is usually safe and the other options are trial and error. You could
> > try looking on the net to find other peoples settings, linux on laptops
> > page may be good for this (this machine is a laptop?) as would looking on
> > the disk manufacturers webpage for specs too.
> >
> > Oh and finally hdparm can destroy data on your harddisk if you go for too
> > many settings and the disk/computer doesn't like them....
> >
> > Adam
> > --
> > "Step away from the Cathedral, This Bazaar is loaded"
> > jabberid = quinophex at jabber.earth.li
> >
> > _______________________________________________
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> > http://www.alug.org.uk/
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