Yes, I know. I looked long and hard at RAID when the tech first dropped because I have so much rare music stored, not to mention BluRay level movies. And in my photo business, I shoot in very high resolution resulting in large file sizes. And you know when those cameras sound like machine guns? Well, all those shots add up. Anyway, it's always come down to a numbers game. The redundancy has to have somewhere to go, so you're going to need more space on your RAID them the amount of data you have. I know the newer RAID does some type of hybrid thing where different sectors are on different drives so it doesn't require as much space. But I'm getting off track. My issue has always been space. I acquire between 5 and 10G of data weekly. Not all of it stays but still. I have over 20T of storage connected right now and I have a couple of externals that I periodically use to backup.
So you see, for me, the cost of a RAID unit running 30T of storage is crazy. It's cheaper for me to just grab externals and back shit up. I really should be looking at writable BluRays. In fact, I'm going to do that now. Downside of that is it's a lot of work.