Originally posted by DVDFabLover2011
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The PIO/DMA snafu is a windoz issue and can involve CD-ROM drives, CD-RW, DVD-ROM, DVD-RW, BD-ROM, BD-RW and IDE hdds.
Most folks use the term burner to differentiate between ODD's and HDD's and I plead guilty.
ROM and RW drives should be called optical disc drives
My apologies for the confusion
Actually, read errors...not burn errors, are the most frequent cause of an optical disc drive (ODD) falling back into PIO.
Maybe this description from my Tips guide on ripping will help:
7) Additionally, slow, inefficient or failed data transfer can be the result of a drive falling back from
DMA mode to PIO mode.
(Direct Memory Access and Ultra DMA modes to Programmed Input-Output mode).
A dvd drive in PIO mode will perform poorly or not at all.
The degradation in the rate of data transfer occurs as Windows encounters CRC errors (max of 6) eventually locking the drive in PIO mode.
You absolutely need to check this in windoz device manager.
It is not sufficient that the device says DMA if available, it needs to actually be in DMA mode. (really this is UDMA).
If you're interested, here is an excellent article on the subject, which both describes the problem in detail and offers solutions.
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Lastly, we don't know that PIO mode is the problem, but that's just the point...
We don't know without adequate info from you.
It's certainly one of the top items on our list of usual suspects and needs to be addressed.
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