hdparms settings (was: [ale] Memory > 64 M)

[Joe Knapka]

Regarding http://www.frankenlinux.com.guides/tweaks.html

This is interesting. My Slack 7.1 machine had DMA turned
on by default, but not 32-bit I/O.

Here are my results with all combinations:

DMA        32-bit      MB/S
----------------------------
0          0           5.0
0          1           6.5
1          0           8.7
1          1           8.5

I did this several times, with pretty
consistent results. The HD is not ATA66, but it
still seems a bit surprising that DMA and 32-bit
I/O both independently improve performance, but
together they don't do as well as DMA alone.
I wonder if this is an HD issue, a mobo/chipset
issue, or a combination of things?

(This experiment was done on a Tyan S1598 mobo
with a WD Caviar 22500 HD.)

-- Joe

Jim Popovitch wrote:
> 
> Hey Rob, Thanks for the link, especially the part about 32bit access.
> I
> got a 350% improvement right away.  Thanks!
> 
> -Jim P.
> 
> --- Robert Hoffman <rob at frankenlinux.com> wrote:
> > This happens on some motherboards. I've got a little guide to fixing
> > the memory problem here:
> >
> > www.frankenlinux.com/guides/tweaks.html
> >
> > -Rob Hoffman
> >
> > ---------- Original Message ----------------------------------
> > From: Armsby John-G16665 <John.Armsby at motorola.com>
> > Date: Mon, 10 Jul 2000 08:05:28 -0400
> >
> > >I upgraded my memory on the Pentium II box I have.  I have RedHat
> > >5.1(2.0.35).  I read that I have to pass the memory parameter at
> > boot. I
> > >have tried the following, both failed.  The PC locked up during
> > initial
> > >start up right about when it is accessing the file system.
> > >
> > >
> > >boot:  Linux mem=97M         Failed.
> > >
> > >Using the GUI tool associated with windows 95 knockoff (LILO
> > configuration)
> > >mem=97M      Failed.
> > >
> > >The machine is smart enough to the 64 meg by default.
> > >
> > >I am sure there is a something simple I have missed.
> > >
> > >
> > >
> > >
> > >I could upgrade but that is another story.  When I have tried to
> > upgrade
> > >(5.2, 6.1), my Creative DAD CD-ROM (ATAPI) refuses to talk to the
> > pci 128
> > >SoundBlaster.  Funny thing is I can get REAL PLAYER to work fine
> > with both
> > >upgrades.  At present the CD-ROM talks to the SoundBlaster via the
> > $35
> > >driver I bought from FourFront Technologies... Works great.
> > >
> > >
> > >
> > >
> > >John
> > >--
> > >To unsubscribe: mail majordomo at ale.org with "unsubscribe ale" in
> > message body.
> > >
> > --
> > To unsubscribe: mail majordomo at ale.org with "unsubscribe ale" in
> > message body.
> 
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-- Joe Knapka
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