It does support SATA, but not SATA III. So, attaching a SATA III HDD will only run at SATA II Speeds (or maybe even SATA I, I cannot tell from the tech spec).
Personally, for a board that old, I would dispose of it and get a new, modern board that supports SATA III.
Remember that the maximum size for the SATA HDD you attach is 2TB. You cannot go bigger than that with that ancient board.
I agree with Al that it is time to replace this board. It is 15 years old.