Hard Drive DMA

I have 2 hard drives on a winME system which are working very well with one exception. I cannot get the UDMA working by using the My Computer drive properties DMA boxes. The Amptron PM-9600 motherboard I have supports UDMA -33. My small (3.1 gb slave) hard drive is DMA 33 capable. The other 20 gb drive is DMA 66 capable. Any suggestions will be welcomed.

 

Have you looked in your BIOS to see if it is enabled there?

 

Unsociable drive problem.

Another point to consider is, sometimes it is necessary to place the drives on different IDE channel, especially when their characteristics aren't exactly the same. It's a matter of timing.

Sometimes it's possible to set longer Wait States in the BIOS but this is not desirable since it is defeating the whole concept of Direct Memory Access.

Good luck.

 

I cannot find any obvious setting in the bios for enabling hard drive dma. I have had similar trouble in the past getting dma to operate on a single hard drive. I found some help that worked on this but cannot remember where. The bios settings are block mode on, LBA on, 32 bit access and PIO = 4