Works fine, a bit expensive
First of all, this is not a real (hw) raid card, raid functions are implemented in the driver. For me that is ok, i did not need it for that. I am using this card under linux (ubuntu 9.10) for a software raid array with the linux kernel software raid (mda), not using the drivers by silicon image. I actually flashed the non-raid bios available from silicon image's site and you should too unless you want to use their raid drivers.Building the same array (same drives, same kernel, same everything) using the sata ports on the motherboard (foxconn 785g) resulted in constant failures of the array. Switching to a gigabyte mb made things better, but still not perfect. With this card i have zero failures for weeks. So as a 4 ports pci-e sata card, it works like a charm with recent linux kernels.The biggest negative is that it is way too expensive for what it is good for. It should sell around $30 like the pci (non pci-e cards from the same manufacturer with the same chipset do. Strangely i found outletpc to be cheapest, even if not by much.