you will need SAS to SATA connectors for that card, and I'm not sure if those drives are suitable. It gets a bit arcane, but raid arrays can drop drives if they do not recover from error states fast enough, some WD blacks do, some dont (mostly newer ones - WD nerfed them to stop people using them as enterprise drives) not sure which yours is. If you have the drives and want to try it, go for it. It's probably going to come down to cost - is the card + SAS-SATA converter cheaper than a couple of SSD's ? oh, and 12 WD Blacks is going to generate quite a bit of heat...