with good or new drives, the standard A1200 IDE port can push around 2.5Mb/s...
off the powerfyler / FastATA i've got over 5.6Mb a second... but i'm interested to see what the ver8.4 drivers can do as the ones i have are little "weird" to say the least.
thinking of ditching IDE and going scsi with a couple of scsi2ide drive adapters. 8-10Mb/s DMA with virtually no CPU load and no driver issues is quite tempting...