Thanks for quick reply, but I have already bought the hard disks, so I would like to try all the options before going on.
I understood that the problem with hard disks >2TB is in the controller firmware (Intel Matrix Storage Manager option ROM), which is updatable. Official board bios (which contains also option ROM) updated the option ROM only to version 7.5.0 ( which is from 2007 :/ ). Is there any way how to update just the option ROM? In EFI Shell, or any other tool? I am willing to accept certain amount of risk, as if I am not able to make the board work with my 3TB drives, I would rather replace the board than buy new (smaller) drives.
I read some interesting options about bios modding on win-raid.com site, but they warned that Intel bioses are packed in non-standard way and that special tools are required. Does anyone have experience with that?