HP DVD740i no DMA option

[raceman3]

AMD Athlon XP2000, Award Bios, ASUS A7V333-x, WinXP SP2. I recently replaced my old Sony DVD burner with an HP740i, firmware ver DC24. I was reading through some of the threads out here and saw sever posts about making sure the IDE controller was in DMA mode in order to improve performance. My primary IDE controller with my hard drive on it is in dma mode. My secondary controller show the DVD burner as Master and Transfer Mode is "DMA if available", current mode is PIO. The Sony CD player on the same IDE controller is in DMA mode. I tried all the tricks listed here and on HP's web site but I can't get the DVD burner to go into dma mode. Any idea what the deal is? If I look in the Bios it shows the Burner as DMA mode 2 PIO mode 4. I can't believe the writer doesn't support DMA since HP's web site has directions for enabling it. Any other things I need to check? I did not see any firmware updates available for the burner either

[noxt]

I tried all the tricks listed here and on HP's web site but I can't get the DVD burner to go into dma mode. Any idea what the deal is?

It might be helpful for you to list "all the tricks."

[raceman3]

Okay, just found two I missed, de-installing the ide controller and looks like there's a registry key that can be deleted as well. I try them tonight and see what the scoop is. Come to think of it when I installed the drive the other night Windows rebooted several times, maybe XP forced it into PIO mode. So far all I've tried is forcing into dma mode with device manager

[raceman3]

Uninstalled the secondary IDE controller last night and when it re-installed it came up as ultr-dma. Ran some tests with Nero CD-DVD Speed 4.10 using a Memorex 4x DVD+RW. Seems like Nero goes to sleep when you first put the DVD in. Anyway after running the Create Disk option as well as the tests I had an average speed of 6.14x which I don't understand if the DVD is rated at 4x. Put a memorex DVD+R 8X in and rand Create Disk and got and average of 7.42x which is around what I expected. Seems like any time the Nero Utility crashes it sets the IDE controller back to PIO. I had to Uninstall the controller twice last night because Nero crashed. After I upgraded to the lastest version I was able to sucessfully run the tests. Will the registry setting I saw in one of the threads in this forum prevent the controller from reverting to PIO mode whenever there's a problem?