I "inherited" a hard drive enclosure from my workplace, including two 2TB WD drives, and intended to use it as a storage space for photos and videos, using RAID1 to keep everything backed up between the disks. The enclosure is this one, although mine isn't branded: http://www.startech.com/HDD/Enclosu...SATA-Hard-Drive-Enclosure-with-Fan~SAT3520U3R After plugging it in to my Macbook Pro, I proceeded to erase the drives using Disk Utility, since I had no use for the old data, thinking it would be easy to just create a new RAID system. However, after having erased the thing, when I now plug it in, the hard drives won't mount. If I take out one of the hard drives (either one), the other one will show up and mount just fine, but when both are installed in the enclosure, the enclosure fans will spin up but none of the drives show up in Disk Utility or on the desktop. I pretty much don't know what I'm doing here, but I'm wondering if you've got any tips or you think the enclosure is somehow broken. Thanks in advance.