There's basic PIO support available for it in Linux -- but Alan blew the 2.4 merge, so it doesn't actually get enabled in the current 2.4.xx kernels -- patch pending for that.

For the much faster "Automatic DMA (ADMA)" operational mode, a special driver is required. They have a binary-only RedHat-7.3 driver on their website, and I'm trying to convince them to release source code for it to make kenel compatibility a non-issue.. soon, I think.

Meanwhile, Andre H. has threatened to write an ADMA driver for it from scratch.. not something I'd really trust, knowing what I know.

Cheers