LoL.... 4x 3.5" and ....... six (!!!) 2,5" ?? What kind of bollocks are this?
Who does use the 2,5 drives nowadays --- if you can have M.2s, use 3,5" for (slow) storage and also mount some more "average" speed SATA3 SSDs also into the 3,5" bays....
Just.... doesn't make sense.... and oh...