Silicon Image SiI3114 SATA controller chip
  Compliant with PCI Specification, Rev. 2.3, 32bit, 33/66Mhz 
  Compliant with Serial ATA 1.0 specification
  Provides four independent channels to support up to four Serial ATA drives
  Supports RAID0(striping), RAID1(mirroring), RAID5(Parity RAID), RAID 0+1 (mirroring+striping) and Concatenation modes 
  HDDs function normally when not in RAID sets 
  Supports SATA up to 150MB/Sec
Manuals & Documentation