I'm in the midst of building a large NAS box but I'm not which drive configuration is the best option for me. I thought about using a Areca ARC controller and hanging all 24 drives off of it. My friend came up with the idea of mounting all of it as one volume (due to the amount of data). We would also configure 6 4-disk RAID 5 volumes, then do a software RAID 5 over those volumes. Is that a good solution?