Why do I need a SAS HBA, I will be testing SATA drives?

STB Suite | The Industry Standard in Peripheral Testing.

Using a SAS HBA allows connecting up to 16 drives per port, or 32 drives per typical SAS HBA. This of course allows testing of that many drives simultaneously.

You can attach a SATA drive to a motherboard native SATA port if you only need to access one drive at a time.