problem with UDMA mode on XP1000

[Riccardo.Veraldi at fi.infn.it]

and is XP1000 IDE controller worse than PIO mode 4??
seems like I Cannot make udma work with this promise.
I cahnged 4 cables, no luck.
I Also changed PCI Slot, the resul is KErnel crashing.
IT works only if I put promise on the second PCI 64 bit slot.
On the lower bottom 32 bit PCI Slot it crashes.

Rick


On Mon, 14 Apr 2003 Riccardo.Veraldi at fi.infn.it wrote:

>
>
> yeah.....
> thanks for sending me this reply, it's really my problem,
> I tyed 3 different ATA cables, and different disks the problem always
> stays.
> With a SAMSUNG ata100 disk I Even had a kernel crash.
> I'll try some different cable...
>
> for curiosity how muc hperform embedded IDE controller on XP1000, is it
> worse than UDMA 33??
>
> thanks
>
> Rick
>
>
>
> On Mon, 14 Apr 2003, Andrew Gallatin wrote:
>
> >
> > Riccardo.Veraldi at fi.infn.it writes:
> >
> >  > anyone has hints how I could fix this problem?
> >
> > I'm re-sending something I sent a few months back when somebody else
> > complained of the same problem in a miata.  Miata's and xp1000 have
> > the same form factor, all the the below applies:
> >
> >
> >   Why?  Well, alphas are electrinically noisy, and physically cramped.
> >   The 500au in particular was designed by some sort of sadist who
> >   wanted things to look pretty and didn't give a damn how things
> >   worked on the inside.  If I had a $1.00 for every drop of blood I
> >   ever lost by skinning my knuckles inserting or removing drives or
> >   pci cards from miatas, I'd be rich.
> >
> >   Rant aside, ATA cables are VERY sensative to EMI noise.  What's
> >   happening to you is that the cable is either badly twisted, running
> >   too close to an EMI source, or both.  This is causing the transfers
> >   across the cable between the controller and the disk to be corrupted
> >   (that's the ICRC error you're seeing).  This is NOT the fault of the
> >   software, rather its a real hardware problemn with your setup.  The
> >   software is saving you from serious disk corruption.
> >
> >   I suggest moving things around inside and making sure that the
> >   cables are kink-free and don't run close to a source of EMI noise
> >   (cpu, powersupply, other pci cards).  This is much easier said than
> >   done on a miata like yours.  You might also consider purchasing the
> >   highest quality cables you can find (I have no suggestions as to
> >   brand..).  Maybe serial ata has better sheilding and would do
> >   better.  I dunno.  I do know that it took me 3 sets of cables and
> >   considerable fiddling to get ata33 to work on a UP1000.
> >
> >   Alternatively, you could use atacontrol to force a slower mode like
> >   udma66 or udma33 which the cable might be more capable of handling.
> >   I have an old promise card in my miata which seems to handle udma33
> >   OK.
> >
> >   Good luck.  You'll need it.
> >
> > Drew
> >
> >
>
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