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ATA Ultra DMA Mode Notes:
  1. DMA Mode for ATA-ATAPI Devices in Windows XP:

    To enable DMA mode using the Device Manager

    1. Open Device Manager.
    2. Double-click IDE ATA/ATAPI Controllers to display the list of controllers and channels.
    3. Right-click the icon for the channel to which the device is connected, select Properties, and then click the Advanced Settings tab.
    4. In the Current Transfer Mode drop-down box, select DMA if Available if the current setting is "PIO Only."
      If the drop-down box already shows "DMA if Available" but the current transfer mode is PIO, then the user must toggle the settings. That is:

      Change the selection from "DMA if available" to PIO only, and click OK.

      Then repeat the steps above to change the selection to DMA if Available.
  2. DMA Mode for ATA-ATAPI Devices in Windows XP:
  3. 327805 - Ultra DMA Mode 6 Devices Are Not Enabled on VIA Motherboards After You Install Windows XP SP1:
  4. 813861 - Windows XP Service Pack 1 Incorrectly Identifies the VIA ...: VT82C686B Chipset as Supporting Ultra DMA Mode 6 instead of Ultra DMA Mode 5.
  5. www.seagate.com - Ultra ATA-100 FAQ:
  6. www.seagate.com - Technology Paper on Ultra ATA: ATA/66
  7. 262448 - Disk Error 11 and ATAPI Error 5 Using DMA Transfer Mode for ATA66 Hard Disk: Win2000
  8. 159560 - DMA Check Box Does Not Remain Checked: Win9x Ver
  9. Download details Windows 95 OEM Service Release 2-2.1 Updated ESDI_506.PDR: Win95
  10. 171353 - Computer with Ultra DMA IDE Controller May Hang: Win95 OEM SR2 & Win95 OEM SR 2.1
  11. 63937 - VDS.exe Demonstrates DMA in Windows 3.0: Windows 3.0
Trade Associations
Win9x Ver
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Web Development, Gill Boyd & Team - Posted 08/29/2003; Updated 08/29/2003