Comments for Windows tries to be helpful again.

Comment from Vraana on 2007-11-24

2007-11-24T20:40:28Z

Solution:
edit registry ResetErrorCountersOnSuccess=1 (KB817472)
IDE ATA and ATAPI disks use PIO mode after multiple time-out or CRC errors occur
http://support.microsoft.com/kb/817472/en-us

and install hotfix
An IDE device runs in PIO mode instead of in DMA mode after you update the firmware for the device in Windows XP
http://support.microsoft.com/kb/920918/en-us
download at
http://thehotfixshare.net

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A comment on: Windows tries to be helpful again.

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Comment from Dave on 2007-10-14

2007-10-14T16:10:10Z

Like other folk, I came across this PIO prob on my DVD drive. The writing in particular slowed down by a factor of 2 or more and NERO actually gave up on a couple of occasions. What is worse, I believe, is that the change to PIO becomes irreversible after Windows thinks it has detected 5 separate occasions when the DVD drive caused errors (or potential errors). No amount of un-installing would get the DMA mode back. I got around this by physically (ie screws an stuff) installing a borrowed DVD drive then re-installing my own, apparently this wipes windows memory and it starts to re-count. Incidentally, un-installing the ATA/ATAPI device to which the DVD is attached also works to recover DMA but this too has a 5 count.
Dave

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Comment from TechTAK on 2007-10-13

2007-10-13T23:53:35Z

We had this one on our radio show awhile back. We got a few calls in a month to the studio with the problem and it took us awhile to figure it out. It's a good thing for a tech to know about.

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Comment from Frank Golden on 2007-10-13

2007-10-13T09:03:56Z

thanks Leo, I had a similar issue with my optical drive a couple of years ago. Windows reverted to PIO mode for the optical drive after having trouble auto starting a CD from a well known PC mag.
The result was a drive that wouldn't play audio CD's without stuttering I got on the phone with HP and talked to a clueless "tech" for over an hour and finaly was told the drive was defective and needed to be replaced. I was close to boxing up the machine (a laptop) when I stumbled on the problem and fix by googling it. All I had to do was reset the drive to "Ultra DMA if available" and all was well. Again thanks for the info.

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Comment from Walter Earnshaw on 2007-10-12

2007-10-13T03:27:31Z

Hi_Leo
A very set of comprehensive answers for this(PIO) problem. If I ever get it these should help
elwaltura

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Comment from Marilyn on 2007-10-12

2007-10-13T02:46:47Z

11892
I believe this happens on days when your spy-sweeper is loading new things, then Microsoft also loads all their new security things, and it happens when you sign on. After a while, you get those things loaded, reboot, and all is fine.

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Comment from Arne on 2007-10-11

2007-10-12T05:03:12Z

This has all the signs of something falling between the cracks. If you click through and get to the hotfix, you'll see that only ATAPI.SYS is modified. In other words, this was done at a very low-level by someone who doesn't go anywhere near UI.

From device drivers to fancy managed code UIs, software spans a humongous range. Getting something all the way up the stack is pretty unlikely these days.

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Comment from The Executioner on 2007-10-09

2007-10-10T01:24:32Z

Yep,

A very common problem, and like you Leo, I have extensive experience in the industry and the first time it happened to me it stumped me for some time... With me, a DVD drive was the Ultra-DMA device that had been downgraded to PIO. This is a more likely scenario for most users than a hard drive, and can occur when a DVD/CD begins goes bad.

It's inexcusable for the Windows OS not to provide a way out for the general user; and worse, to flip modes without telling anyone.

Why they haven't changed this behavior in an update is beyond me.

Let the user decide, or at least react appropriately. Let's put into perspective what PIO mode means (from the viewpoint of the OS): If you've entered into PIO, your media, or your device, is possibly in trouble. If the OS is having trouble getting data off the device in the preferred DMA mode - it should tell you! Would you prefer it remain in PIO until the media, or worse still the device gives up entirely?

I wouldn't...

regards,
The Executioner.

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Comment from Ken B on 2007-10-09

2007-10-09T15:29:41Z

That was it. I deleted the channel from the control panel, rebooted, and when it re-detected the drive, it set it to UDMA-4 instead of PIO. No more stuttering movies. And, though I haven't tried it, I can only assume that reading data will be faster as well.

One cup-o-joe on its way. Thanks.

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Comment from Ken B on 2007-10-08

2007-10-08T18:12:42Z

Thank you!

While I don't have a "my whole system is slow" problem, I do have a problem with one of the DVD drives stuttering during playback. Sure enough, it's set to PIO, while the non-stuttering drive is UDMA-2. I'll give your suggestion a try and see what happens.

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A comment on: Windows tries to be helpful again.

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