So i just purchased myself a new hyper-V host.
Gigabyte-X58A-UD7, 24GB DDR3 RAM, 2 x SATA3.0 (6bps) 600GB WD raptors
Short story – the mavel SATA 3 controller on this motherboard is completely fucking useless.
Add the drives to a RAID-1 set, one constantly just drops out. Try to use the two drives independantly, one randomly dissappear… and the performance from the one that does work is very very average.
Swap them over to use the ICH10 (Sata2) ports…. everything just works.
Save yourself some cash and just get SATA2 drives instead…. and clearly, with SATA3 implementations like this – its not going to be used until an intel chipset comes out with SATA3 inbuilt.