Question about Microsoft Windows XP Media Center Edition 2005 for PC

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Software downgrade or uninstall messes with driver, throws **DVD** copy/write into PIO

I am about to undertake my THIRD OS reload of 2008. Why?

The first time (in January) it was because I'd upgraded to Media Player 11, then downgraded back to MP10. After completing the downgrade, DVD copying and burning slowed to a crawl. (I'm using an OEM Panasonic branded DL DVD burner with a similar part number to a Samsung drive I'd owned previously.)

Now I'm facing the same problem, except that the suspect software this time is the manager software for Nokia flip-phones (my best friend in town is clueless about the finer points of technology, etc.), which was installed, uninstalled, and reinstalled (at which point the problems started).

This time I did some more digging, and was able to compile the following information:

** Regardless of the type of disc being read, Windows becomes much touchier about dropping into PIO.
** Windows goes into PIO when copying from or writing to data DVD's, no exceptions.
** Windows can be kicked back into DMA, but only with respect to CD's.
** At no time does my BIOS say that it's running in PIO mode.
** Transferring files between the USB external and the SATA internal HDD chews up a max. of 22% of the cycles on an AMD 3800 (single core), but when Windows reads the headers of media files on the external drive, CPU usage leaps into the 90s. This last bit is puzzling, but overall I'm inclined to believe that neither the optical drive nor the hard drives are dying.

After much digging about, the conclusion I've reached is that the software uninstall process clobbers a driver somehow... but hell if I could tell you which one.

What say any experts?

Posted by on

  • bhenick Aug 30, 2008

    A few addenda:

    [1] I I don't run any AV at the moment, and when I do, auto-protect is disabled; I do overnight scan+quarantine instead.  Even without AV software, I can count on the fingers of one hand the number of times I've been clobbered with viruses and malware... in ten years of using my own hardware on a daily basis. Safe computing FTW.

    [2] Slow burn speeds are only one of the symptoms; the MOST BOTHERSOME SYMPTOM is actually the slow xfer rate between the optical drive and the HDD, which is slow precisely because Windows is INEXPLICABLY doing the xfer in PIO mode... despite the fact that both Windows and the BIOS are set to DMA and all of the usual steps have been taken to ensure that this is, in fact, the case.

    Again, all signs point to a missing driver that never should have been removed, but was removed automatically during software uninstallation.



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1) I've discovered over the years that disabling the 'auto-protect' mode on the anti-virus while burning speeds up the process.
2) Try uninstalling the BURNER software instead of anything else, I got a laptop in my shop the other day with SLOOOOooow burn (if at all) process, by uninstalling and installing another burn software (Roxio instead of Nero for example), tends to alleviate the problem.

Hope this helps.

Posted on Aug 30, 2008


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