All good questions I would like answers for as well, but I have another issue.

The supplied screws to mount the hard drive (or what I assume are the screws to mount the hard drives, seeing as there are no instructions provided regarding this). First, there are only 5 screws, when I would expect there to be 12 (4 screws per drive, 3 drives total) Second, after attempting to mount the first drive using 4 of the screws, I was left with it not really being secured. It is screwed in all the way, but still really loose and moves around a lot in the chassis. This is not good, especially for mechanical drives.