dont me to LOL here but your not going to find a mother board with 8 sata ports the most I have seen is 4. Your going to need to get a raid card. check out tomshardware they did a new letter on sata raid cards I like 3wire myself.
The K8N4-E has 8 SATA Ports.
Also, my A8N-SLI Dlx has 4 SATA and 4 SATA2 Ports.
Not to mention I have a 4 Port SATA Raid card on top of the motherboard, as posted in my first post.
Please research before thread-crapping.