Youyeetoo YY3568 ARM Development Board - NAS solution questions

what I want to achieve are:

  1. connect two 3.5” HDD SATA III, and software RAID 1

  2. md will have three partitions, boot, OS, and data

  3. boot OS from the md0

is the this doable, and am looking for hardware or accessary board to do this. I saw you have two power connectors board for 12V connection but only one SATA HDD or SSD connector to this yy3568 board. Are there other options?