I recently decided to shell out for a somewhat pricey RAID card for my home NAS. It wasn’t an easy decision, but I really wanted a card that supported Online RAID Level Migration (ORLM) and Online Capacity Expansion (OCE) at the hardware level.
Do I really need this at home? It turns out that I do. I am currently migrating my original two-disk RAID 1 array to a three-disk RAID 5 array, which will non-destructively double my usable space.
I don’t really have anything else to say about this; I just think it’s really cool. Good lord, I’m a geek.