VIA's VT6421 PCI Serial ATA RAID controller
Here's a snip from VIA's press release
Taipei, Taiwan, 13 January 2004 - VIA Technologies, Inc, a leading innovator and developer of silicon chip technologies and PC platform solutions, today announced the launch of the VIA VT6421, a discrete controller providing high performance Serial ATA RAID. Built on VIA's renowned DriveStation™ technology, the VIA VT6421 controller supports the full spectrum of PC processor platforms for desktop and mobile PCs, enabling control through PCI and Cardbus (PCMCIA) interfaces.
The new controller supports RAID 0, RAID 1, and JBOD.