It would probably be better if you tell us what its use would be.
I would suggest that you look into NAS devices first as they are capable of fulfilling your needs.
e.g. QNAP, Synology.
Which socket do you need and are you talking about motherboards for an Intel processor or motherboards made by Intel?
The ASRock P67 Extreme6 supports 10 SATA connections, as do their more expensive Z77 Professional and Z77 Extreme9