Your desktop format and RAID is not what the enclosure supports so it's some wasted effort.
However if you were to do that you could check the SMART VALUES 01 and 07 afterwards (I use Speccy for that) and see if the drives are in perfect condition.
So i did ask a similar question earlier but i want expand on the answer slightly. I have an external 2 bay enclosure that has hardware raid and i plan to use raid 0. So should i do a full windows(10) format with each drive separately then configure them in the hardware raid 0 or should i just put them in the enclosure, set it to raid 0, and then do a full windows format? Is there a difference? I always do a full format with new drives just to be sure there is no major issues from the start. If there is no difference would it be faster to set them up in the hardware raid 0 then do a full windows format?
Thanks again so much for all of your help,
Shane

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic