I recently had my motherboard go out and I replaced it with a new one. On the old board I had problems with my computer slipping into PIO mode. I am now having the same symptoms as before but the "uninstalling of the seconday IDE Channels" fix is not working. My new systems displays two secondary channels in the IDE dropdown. When I go into both of them it says in the "current transfer mode" NOT APPLICABLE not DMA Mode. Symptoms: -Says NOT APPLICABLE in the Current Transfer Mode under Secondary IDE's -The system backs up DVD's at 2,400KB/s with 12mb buffered, used to be 5,000KB/s or faster -When burning the Write Rate jumps back and forth between 2400KB/s and 1800KB/s, used to be a steady 5000KB/s -The system will not burn any faster than 1.8X, it used to be 8X -When burning the Buffer is always displaying 100% -Device Buffer jumps back and forth between 20% and 100% I am not a computer expert and this is my first build, please help!!!!
You might have a dvd burner that is going out. The motherboard replacement should have fix the problem. If you are using xp this how I always reset my DMA. Getting back to DMA mode in Windows XP But first check and make sure it's required. Open control panel/system/hardware/device manager/IDE ATA ATAPI controllers. CD-ROM and DVD-ROM drives can revert to using PIO mode, despite being set to use “DMA if Available.” Here’s how to make Windows XP redetect the DMA capabilities of the drives. This behaviour occurs with the following conditions: * Windows XP is the operating system * A CD-ROM or DVD-ROM drive, which is known to support DMA mode now works only in PIO mode. * The drive controller is set to use “DMA if available” but reports to be only in PIO mode. Following is the mechanism that has worked for me, please try it at your own risk, it involves hacking the registry: 1. Open RegEdit 2. Find the following KEY: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\ Class\{4D36E96A-E325-11CE-BFC1-08002BE10318}\000x 3. The last four digits will be 0000, 0001, 0002, 0003, and so on. 4. Under each key, delete all occurences of the following values: MasterIdDataChecksum SlaveIdDataChecksum 5. Reboot the computer. Windows will now redetect DMA settings. This can reset it, but if your burner is no longer capable of reading the DVD's correctly it will reset back to PIO eventually.
