the adaptec card you have will support both raid and JBOD at the same time but not on the same 4 port connector
(you need to create 2 storage pools)
in other words each 4 port cable needs to be RAID or JBOD (and the card needs to be in raid mode)
if all ports are to be HBA, then select this mode in the 71605 bios and the card will then become a 16 port SATA/SAS HBA card using the cards bios to manage the ports, however any device on these ports can be moved to any motherboards sata ports and be read/write as they are in standard sata format
https://download.adaptec.com/pdfs/user_guides/adaptec_raid_controller_iug_6_2015.pdf