Ultra DMA Mode 6 Devices Are Not Enabled on VIA Motherboards After You Install Windows XP SP1


After you install Windows XP Service Pack 1 (SP1), IDE ATA-133 (Ultra DMA Mode 6) devices on motherboards that use VIA Technologies chipsets are not enabled. This occurs although Windows XP SP1 supports Ultra DMA Mode 6.


When you install Windows XP SP1, devices on your computer are not reinstalled in the process. The Ultra DMA Mode 6 devices were not supported before you installed Windows XP SP1.


To resolve this issue, update the driver for the IDE controllers in Device Manager. To do this, follow these steps:

  1. Right-click My Computer, and then click Properties.
  2. Click the Hardware tab, and then click Device Manager.
  3. Expand IDE ATA/ATAPI controllers.
  4. Double-click Primary IDE channel, and then click the Driver tab.
  5. Click Update Driver.
  6. Click Install the software automatically, and then follow the on-screen instructions to complete the process.


This behavior is by design.

More Information

For additional information about VIA Technologies products, visit the following VIA Technologies Web site:

Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.

The third-party products that are discussed in this article are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.