UDMA support - IDE connector (ATAPI devices)

[Gerd Gerdes]

Hello, i would like to enable UDMA support for the Compaq CD-ROM LTN486S on a ML-310 and ML-330 server with Windows 2000 Server as OS. But it isn't possible, only PIO-Mode is adjustable. Even a new UDMA-5 Harddisk supplies only PIO-Mode. Do you have any solutions?

[Tarek Kawach]

Hi Gerd:

To resolve this issue, the drive timing mode for installed CD-ROM and/or DVD drives should be set to advanced mode (if the drives support advanced mode):

Click Start, then point to Settings, and then click Control Panel.

Double-click Administrative Tools, then Computer Management, and then Device Manager.

Double-click IDE ATA/ATAPI.
Click Advanced Settings.

In the "Transfer Mode" box, for each listed device, select the DMA if available option.
Click OK.

Restart the computer for the changes to take affect.

Here is what I found from HP:

Performance of CD and DVD Drives may be Reduced after Installing Microsoft Windows 2000 Professional

customer advisory DK000203_CW01 revision 0
released February 2000

http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=PSD_DK000203_CW01


Device Manager Lists ATA-100 Device As Using PIO Instead of UDMA Mode

customer advisory DB010227_CW03 revision 0
released March 2001 last updated 24 September 2002

http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=PSD_DB010227_CW03

also from check out MS Hotfix Article 817472 (only use if you have to)
Microsoft Knowledge Base Article - 817472
http://support.microsoft.com/default.aspx?scid=kb;en-us;817472

Best regards,

Tarek.