UDMA100 in Win2k?

[Frazas]

UDMA100 in Win2k?
How can I be sure of what UDMA mode my system is using? I am wunning Win2k.

Thanks!!!

 

[AndyHui]

Make sure that you have Service Pack 2 installed.

Then check the device settings:
Start, Settings, Control Panel, System, Hardware tab, Device Manager, IDE ATA/ATAPI Controllers

Double click on both the Primary IDE Controller and the Secondary Controller. It should say DMA on the Advanced Settings tab.

 

[Frazas]

I asked the question because of two reasons:

First, when I changed to a board that supports my UDMA100 disk I touight that I would get an increase on my HDTach score (which didn't happened).

And second because of this:
http://www.microsoft.com/downloads/release.asp?ReleaseID=22161

It says that Win2k doens't support UDMA 100 unless you install this patch but I didn't saw that it was included in SP2 (which I have installed)

 

[AndyHui]

If your existing controller was ATA66, then you will not see any performance increase by going to ATA100, since hard drives are not capable of exceeding the limit due to the ATA66 interface.

 

[Frazas]

Well, I guess we never stop learning.....

So, I guess it is just another feature that is utterly useless?

 

[FullRoast]

The only difference you would see from ATA66 to ATA100 would be in the maximum burst transfer rate, not in the sustained rate. I don't have it here, but I thought that HDTach showed the burst transfer rate. You could check to see if that changed.

Not that I am recommending it, but the Intel ATA driver comes with an application that will show the mode settings for the HDD and Controller and what rate the driver is operating in. The application is specific to the Intel driver, though, and will not tell you what the native driver in the OS is doing.