I would like to connect 16 drives to an onboard LSI SAS2308 6Gbps HBA. The HBA is present on my X9SRH board in form of blue SATA-style connectors, eight of them.

Would it be possible to "multiply" these 8 ports, so I can connect more than 8 drives, without having to use a backplane?
It's my first time working with SAS, so I'm not entirely sure if what I want is even possible. I was hoping I could use an adapter like this for the job:
cs-electronics.com

(i.e. attach this board to a SAS HDD, connect my onboard ports to "primary", and connect an additional drive via "secondary")
Assuming this would work, do I need any special data cables with my onboard SAS connectors, or are these compatible with SATA data cables?
And would the 2nd drive also need to be a SAS drive, or could I connect a SATA drive to the "secondary" port?
Thanks for the help!

Would it be possible to "multiply" these 8 ports, so I can connect more than 8 drives, without having to use a backplane?
It's my first time working with SAS, so I'm not entirely sure if what I want is even possible. I was hoping I could use an adapter like this for the job:

SAS Drive Adapter - 3.5" Form-Factor - Dual Ported - Hot Swap - CS Electronics
SAS Drive Adapter - 3.5" Form-Factor - Dual Ported - Hot Swap


(i.e. attach this board to a SAS HDD, connect my onboard ports to "primary", and connect an additional drive via "secondary")
Assuming this would work, do I need any special data cables with my onboard SAS connectors, or are these compatible with SATA data cables?
And would the 2nd drive also need to be a SAS drive, or could I connect a SATA drive to the "secondary" port?
Thanks for the help!