freebsd stable - Oct 2008 - no cable, but "DMA limited to UDMA33, controller found non-ATA66 cable"

I am trying out BEAT2 on a machine here, installing onto a compact
flash card, but when I boot I get the error above. This is slightly
puzzling as the CF card is in an adapter which plugs directly into
the motherboard.

If I move the card to dangling off the end of a cable, the warning
goes away and the card operated at UDMA66 properly. Is this a bug,
or something unavoidable ? Is there a way to turn the test off if
the latter - with the card connected directly to the motheroard it
should be cabale of doing UDMA66 as well as on a cable surely ?

Slightly puzzling,

-pete.

On Tue, Oct 21, 2008 at 07:44:31PM +0100, Pete French
wrote:
> ...
> Is there a way to turn the test off 
> ...
Try setting the following in /boot/loader.conf:

hw.ata.ata_dma_check_80pin="0"

You can see the description of this, and other tunables, in the ata(4)
man page.

-- 
| Jeremy Chadwick                                jdc at parodius.com |
| Parodius Networking                       http://www.parodius.com/ |
| UNIX Systems Administrator                  Mountain View, CA, USA |
| Making life hard for others since 1977.              PGP: 4BD6C0CB |

> Try setting the following in /boot/loader.conf:
>
> hw.ata.ata_dma_check_80pin="0"
Now that looked promising, but unfortunately it doesnt help. Even
with this set I still get the same message. If this is supposed to
disbale the check (as it appears) then I am even more puzzled.

-pete.

On Tuesday 21 October 2008 06:13 pm, Pete French wrote:
> > Try setting the following in /boot/loader.conf:
> >
> > hw.ata.ata_dma_check_80pin="0"
>
> Now that looked promising, but unfortunately it doesnt help. Even
> with this set I still get the same message. If this is supposed to
> disbale the check (as it appears) then I am even more puzzled.
Unfortunately this useful tunable is unavailable for 6.x.

Jung-uk Kim

> > > hw.ata.ata_dma_check_80pin="0"
>
> Unfortunately this useful tunable is unavailable for 6.x.
Ahh, but this is 7.1-BETA2 on amd64 - it should be available there, yes ?
The manual page says it should work, and I have found the point in
the source code where it is supposed to interpret it. There are, however,
many places which produce the above message, some of them appearing to
not check this flag after a quick peruse of the code.

I would have assumed it was one of these, but if I change it from
being plugged directly into the socket to being on the end of an 80pin
cable then the message goes away. The adapters I am using for the CF
card to the cable are simple passive sockets, and its the same card
plugged into the same ATA channel each time.


-pete.