Not only this. All of the clasic AMIGAs seem to NOT be able to use DMA for IDE hard disks.
What this means is that ATA 133MB/s is not going to happen, infact neither will the 100/66/33 modes either.
The AMIGA clasic using even that 3rd party IDE thingy still can only use the PIO modes of the drive. I think from memory that PIO 4 is the fastest mode available on IDE thesedays which does maximum 12.5 MB/sec.
PIO modes use the CPU for all transfers to and from the hard disk. DMA stands for Direct Memory Access which is an attempt to make the PCI bus and logic do the CPU work direct to memory and leave the CPU out so it can do other things.
The higher speed ATA modes are what prompted a cable design change, so you could use an older cable without any problems on that drive if it's plugged into a clasic AMIGA cause it won't be using any of the newer features (faster speeds) of todays drives. That's if you can get past the size barrier as well mind you. lol
