Re: IRQ disabled (SATA) on NForce2 and my theory

[Bob]

Bartlomiej Zolnierkiewicz wrote:

> On Monday 15 of December 2003 07:06, Bob wrote:
>  
>
> > sii chips have a long history of needing to
> > hdparm off the unmask interrupt feature.
> >
> > I don't know about that chip but for
> > sii680 there is a special option "-p9"
> > for hdparm which is to say pio mode 9
> > is a special instruction in addition to
> > standard hdparm opt "-u0" turning off
> > irq unmask.
> >    
>
> There is no such thing as 'special option "-p9"' for sii680.
>  
Passing PIO mode 9 to sii680 will make it do udma133 with
unmask off, same as "-X70 -u0". What sii did was to make a
bug a feature by embedding their own special pio mode for the
well-known cmdxxx unmask off requirement.

Making A Bug A Feature is begging for "deprecation".

Since -p9 was only documented to set u133 and unmask off,
making a bug a feature, non-bug features are not user-expected
to be set without using other(normal) hdparm options, so
somebody might as well "man hdparm" and bypass the silly
kludge which probably was an internal office joke anyway.

-Bob

> > /sbin/hdparm -d1 -c1 -p9 -X70 -u0 -k0 -i $a
> >    
>
> -X70 is only valid if your device is UDMA133.
>
> --bart
>
>  

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