Promise PDC20269 - PIO Only?

Promise PDC20269 - PIO Only?

[Jeremy Huddleston]

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Hi,

I've been using two Promise PDC20269 cards for almost a year now in my system.  
The cards are U133, but when the kernel boots up, I see the message that all 
the drives are operating in pio mode.  All the drives are U133 drives, and 
they are shown as operating in DMA mode when I put them on another 
controller.

I've noticed this deficiency with vanilla linux-2.4.19 through linux-2.4.21, 
linux-2.4.22-ac4 as well as 2.6.0-test6-mm4...

Is there a patch to the 2.4 kernels availible to enable this support?  Is this 
problem being addressed?  Is there any way I can help out?

Thanks,
Jeremy
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Re: Promise PDC20269 - PIO Only?

[Måns Rullgård]

Jeremy Huddleston <jeremyhu@uclink4.berkeley.edu> writes:

> I've been using two Promise PDC20269 cards for almost a year now in
> my system.  The cards are U133, but when the kernel boots up, I see
> the message that all the drives are operating in pio mode.  All the
> drives are U133 drives, and they are shown as operating in DMA mode
> when I put them on another controller.

I've got a PDC20268.  My boot messages also say PIO.  However, it
still uses DMA by default.  Check with "hdparm /dev/hdX" whether
your disks use DMA.

-- 
Måns Rullgård
mru@users.sf.net