Subject: Re: new SATA controller/drive _very_ slow (PIO mode 0)
To: Stephen Degler <>
From: Jim Bernard <>
List: current-users
Date: 12/17/2007 12:38:25

On Mon, Dec 17, 2007 at 01:25:56PM -0500, Stephen Degler wrote:
> >  I've recently added to an old x86 system a PCI SATA controller (VIA 
> >  VT6421)
> >with a single SATA disk (WDC WD5000AAKS) attached.  The system is running
> >-current built from sources updated Nov. 17.  The disk works, but the data
> >transfer rate is excruciatingly slow, about 4 MB/sec, because the driver 
> >uses
> >PIO mode 0.
> Just a thought.  Most new SATA drives come with a 150/300 interface 
> speed jumper.  As I believe the controller is 150 only, ensure that the 
> drive is set to 150 as well.

  Thanks.  I tried that early on, just in case the automatic speed
setting on the drive didn't work, but the performance is the same with
or without forcing the drive to 150.