Can I use any of the six sata ports on p6t

I've just finished assembly of a system based on Asus P6T motherboard.

I have a single sata hard drive and a single sata dvd burner.

I want to be able to add later another two hard drives and a blue ray burner.

Can I initially use the sata ports labeled 5 and 6 on the board for the hard drive and dvd burner I'm starting with? Then, later use some of the other sata ports to add the other devices?

I want to use 5 and 6 initially because they are the only two pointing up from the board. The other sata ports are coming out the side on risers.