Re: hdparm for lib_pata

[Stephen Clark]

Robert Hancock wrote:

> > Hi guys,
> >
> > Me again, sorry.
> >
> > Is it possible to make hdparm work with libata?
> > I have some drives that for some reason fall back to lower UDMA
> > settings (like UDMA/44) while the drive is UDMA/100. I blame the way I
> > set-up my raid arrays for this and the bus not being able to handle
> > all the data that goes trough it but that isnt really the case now.
> >
> > Anyway, I used to be able to force the drive back with using hdparm
> > -X68 -d 1 /dev/sdk
> > But with the new lib_pata drivers I get "Inappropriate iotcl for
> > device" and HD_IO_DRIVE_CMD Input/Output errors.
> >
> > Or! Is there some other way to force the drive not to failback to
> > lower UDMA settings? (Yep, I know, if this is answer, it's my risk, I
> > cant and wont blame you for destructing my pr0n or severe trauma I
> > suffer from losing data)
> >    
>
> Only some of the hdparm functionality is supported in libata, which is 
> partially by design. Presently there's no way to override the DMA 
> settings in libata, it starts out at the fastest supported settings and 
> falls back if it gets too many errors of certain types.
>
> You shouldn't be seeing errors like this unless you have bad IDE cables 
> or are using 40-wire cables with high UDMA modes. Can you post the 
> output you're seeing?
>
>  
Ok,

But why are we taking away the users capability to control his/her own 
hardware. Sounds like windows.

My $.02
Steve Clark

--

"They that give up essential liberty to obtain temporary safety, 
deserve neither liberty nor safety."  (Ben Franklin)

"The course of history shows that as a government grows, liberty 
decreases."  (Thomas Jefferson)



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