> -----Original Message-----
> From: Rod Roark [mailto:[EMAIL PROTECTED]]
> Sent: woensdag 12 april 2000 4:11
> To: Discussion List for Linux on Abit Motherboards
> Subject: Re: [LINUX-ABIT] [forwarded] ATA Announcement (new info on
> errors)..POWER SUPPLY
>
>
> On Tue, 11 Apr 2000, you wrote:
> >
> > In case anyone missed Andre's post to linux-kernel...
>
> How interesting. So it's the *quality* of the power supply, not just
> its output. That may very well explain why some folks have
> intractable
> problems and others (like me) never see a hiccup.
It's a good solution considering it often happens at heavy HDD load and network load...
> Thanks Andre!
Thanks again!
Arjan
> -- Rod
> ----------------------------------------------------------------------
> Sunset Systems Preconfigured Linux Computers
> http://www.sunsetsystems.com/ and Custom Software
> ----------------------------------------------------------------------
>
> Attachment quoted below:
>
> Date: Mon, 10 Apr 2000 22:24:15 -0700 (PDT)From: Andre
> Hedrick <[EMAIL PROTECTED]>
> To: [EMAIL PROTECTED]
>
> For all the folks out there having problems with timing errors and
> general problems in having DMA (specifically Ultra DMAing), I have a
> new data point from an industry meeting that was held today (April
> 10th).
>
> It appears that verification from manucaturers and owners of the UDMA
> technology patent have noted the short comings of the
> "electronics" and
> "signal" stablity based upon different data clocking states.
> Some of this
> is a direct result of OEM failing to adjust the limiting shew offsets
> between the host and the device and potential crosstalk.
> This may be a
> real issue; HOWEVER........
>
> Many of the signal traces displayed signal contamination due
> to JUNK/DIRTY
> power supplies.
>
> If you have a standard chipset that is supported and you know
> of others
> with your exact setup that runs and yours fails..........
>
> Check your PowerSupply!
>
> I will try to extract the safe ranges that levels can vary
> and the noise
> limits, but this is a very serious issue that has had no
> probable solution
> until know. If you have a clean power supply and it still is
> an issue,
> we need to address the IDC connection point!
>
> This is a hardware issue that there is nothing that the OS
> can do to solve
> the problem............:-(
>
> Andre Hedrick
> The Linux ATA/IDE guy
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