Hey OP, great discussion. I am new to farming so would like to learn from your setup.

Currently I am still plotting on my single 8TB HDD (just started the next day after official pool) but would like to start expanding.

From what I am seeing from the thread, I should buy SAS HBA controller. and you also mentioned you are using something similar like this? https://www.amazon.com/gp/product/B01BMJ1WD6?pf_rd_r=H5RCMX881HR7DWZCW11D&pf_rd_p=5ae2c7f8-e0c6-4f35-9071-dc3240e894a8&pd_rd_r=53a05841-b6b7-4fa3-8a86-43801a0437b4&pd_rd_w=Jn9zg&pd_rd_wg=m1x8M&ref_=pd_gw_unk

Can you share what you are using?

Also I am even thinking getting a 3D printer, to just print the HDD rack lol

Still trying to figure if I want to do external HDD, I know the HDDs are powered by USB adapter, but how to cascade the data line?