I have sata 2x maxtor 6Y250F0:
Both sata shows in BIOS and Vista, first sata don't work and second works fine.
I have install:
Via driver: via_hyperionpro_v511a(20070131140503)
Abit kv8 pro
AMD 3700+
GeForce 6600gt 128Mt
2Gb Ram
HD: 80Gb XP,120Gb Vista, sata 2x 250Gb