That's a nice pick, you don't need any HBA then, you already have it on MB.Talked with BlueFox and now looking at a X9DRD-7LN4F-JBOD MB.
laroslav, what back plane would I need to use a single HAB?
Yes, you're right, I meant BPN-SAS3-216EL1 but was too fast, it's for $350, a bit pricey. No need in dual as well, but $5 for an extra daughter card to have is not a big deal anywayNo sense in paying extra for the dual expander backplane. This is the one to get: Supermicro BPN-SAS2-216EB 24 Port SAS Backplane with 1x BPN-SAS2-216EL Card | eBay
The linked SAS3-216A-N4 does not have a built in expander and would be a waste of money for 24 hard drives. You would still need to use multiple HBAs.