I am wondering if anyone has experience with the following situation: I have an Areca RAID card (1680) with 4 1TB drives in a RAID 5 setup. I am wondering if it's possible/easy to add another 4 drives through an external enclosure and expand my setup to an 8-drive RAID 5 setup. The extension of the RAID array is easy, and I see how to do that through the RAID card, the question I have is once I do that, can I just expand the boot partition in disk utility to fill up the 7 TB array, or will I have to reformat to use the additional 4 TB? If anyone has any experience with this, I would very much appreciate hearing about your experience. Thanks a lot!