I currently have about 4TB of photos (well, 2TB, and 2TB duplicates on external disks), and with a camera that generates another 30MB with every click, I’m looking at future-proofing a little!
My initial plan was just the RAID6 NAS, as I reckoned that level of redundancy *should* prevent any horrors. But, lightroom et al won’t take a library off a network share. Irritating, as I have a gigabit router, so access should be plenty fast enough.
And yes, DAS does stand for direct attached storage. I guess my reasoning for this route is that I could just plug it in to a laptop without having to ferry gigabytes over the network if I have been away and amassed a collection of photos on the laptop….