Win2k / DMA66 with add-on IDE controller

[Nessism]

I have a Asus CUBX, with CMD DMA66 controller on the motherboard, running Win2k. After reading about how Win2k does not use UDMA by defalut, I checked the registry settings that pertain to the IDE controllers - HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E96A-E325-11CE-BFC1-08002BE10318}. I can not see any entry that call out UDMA support.

My question is that since my motherboard is using a seperate controller for the hard drive, do I have to mess around with trying hack the registry to enable UDMA? Everything seems to work well and Sandra is showing a hard drive score of 23500. Any help is appreciated.

 

[Nessism]

Anyone?

 

[Panther505]

UDMA support is disabled by default period. If you are looking for the higher transfer speed then you need to hack it. My server is running a promise u66 controller as a controller for 2 storage drives and I put the hack into the registery and saw a noticeable difference ( as much as you can notice without benching it)

 

[Nessism]

Panther505,
Thanks for tossing me a bone...but I don't understand what to do. I tried to experiment by adding a DWORD (EnableUDMA66, value = 1) into the reg for the CMD controller and I did not notice any difference when benchmarking with Sandra 2001. I also tried adding the DWORD into the popular 0000 reg but the results were the same. Please give me some details as to what you did. For information, Sandra gives me a score of 23150 for my HD benchmark which seems good - can this go higher?

 

[Panther505]

This is for enabling UDMA on Intel Chipsets so check it out and see what applies to you http://support.microsoft.com/support/kb/articles/q247/9/51.asp

 

[Agamar]

SP2 is supposed to fix this problem, BTW, so if you wait about 2 more weeks, we shouldn't have to worry about it anymore.

 

[Panther505]

I have a low level of confidence that SP2 will be out in 2 weeks.. I have not heard that they it is in beta test right now. The lab that I work in deals almost exclusively in MS products and aI would have heard that it was in test(I think).. SO I would be surprised if it is out in 2 weeks...

 

[Nessism]

After spending a fair amount of time playing around with the reg entrys for the motherboard IDE controllers (Intel BX as well as for the external IDE controller card/chip) I have come to the following conclusion:

When an seperate ATA66/100 controller chip is used to control the hard drive, no registry hack should be necessary to enable ATA66/100. The stand alone driver should take care of this.

I don't know about VIA chipset boards but I suspect similar.