Asus K8N-E and slow disk transfer

[Astrodog]

On Thu, 6 Jan 2005 16:52:35 +0000, Ganael Laplanche
<ganael.laplanche at martymac.com> wrote:
> Hi,
> 
> Thank you for you answer :)
> 
> I have a new 80 lead ATA cable (a brand new provided with my mobo) and my disk
> is a single device on the channel (no slave)...
> 
> Any (other) idea ?
> 
> Ganaël LAPLANCHE
> ganael.laplanche at martymac.com
> http://www.martymac.com
> Tel : (+33)6.84.03.57.24.
> 
> ---------- Original Message -----------
> From: Lars Tunkrans <lars.tunkrans at bredband.net>
> To: Ganael Laplanche <ganael.laplanche at martymac.com>
> Cc: freebsd-amd64 at freebsd.org
> Sent: Wed, 05 Jan 2005 18:59:10 +0100
> Subject: Re: Asus K8N-E and slow disk transfer
> 
> > Ganael Laplanche wrote:
> > > Hi all,
> > >
> > > I've just bought an ASUS K8N-E mobo. I'm using FreeBSD-5.3-Stable (amd64) and
> > > suffering from *very* slow disk transfer rates. The chipset is an nforce3 and is
> > > correctly detected at boot :
> > >
> > > # dmesg
> > > [...]
> > > atapci0: <nVidia nForce3 Pro UDMA133 controller> port
> > > 0xffa0-0xffaf,0x376,0x170-0x177,0x3f6,0x1f0-0x1f7 at device 8.0 on pci 0
> > > [...]
> > >
> > > My disk is an UDMA100 one, everything seems to be correct :
> > > # atacontrol mode 0
> > > Master = UDMA100
> > > Slave  = BIOSPIO
> > >
> >
> >    If you have a New and an OLD disk on  the same ATA chanell ;
> >   Do you have an old 40 lead or an new 80 lead ATA cable ?
> >
> >   80 lead cable is a requirement för UDMA100 !
> >
> > //Lars
> ------- End of Original Message -------
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This may be a potential NForce3 Compatibility Issue.

You may try using atacontrol to force the "slave" to UDMA100 as well.

Also, at 11MB/s, its above the rate I'd expect to see if it was using
PIO (Though, I may easily be wrong on that). Also, if you're copying
from the disk, to the same disk, keep in mind, 11MB/s apparent, is
22MB/s of disc I/O.

What kind of CPU usage do you see during the copy? (time, uptime, and
vmstat output would be helpful)

--- Harrison Grundy