What os?
I'd suggest Linux software raid, with the answers no and easy.
We are digital librarians. Among us are represented the various reasons to keep data -- legal requirements, competitive requirements, uncertainty of permanence of cloud services, distaste for transmitting your data externally (e.g. government or corporate espionage), cultural and familial archivists, internet collapse preppers, and people who do it themselves so they're sure it's done right. Everyone has their reasons for curating the data they have decided to keep (either forever or For A Damn Long Time (tm) ). Along the way we have sought out like-minded individuals to exchange strategies, war stories, and cautionary tales of failures.
What os?
I'd suggest Linux software raid, with the answers no and easy.
Motherboard raid is pretty standard. It's been 10 years since I've played with it, but back then you could migrate motherboard raid1/5 across any motherboard and even from intel to amd. I doubt it's changed much.
I doubt you'll find official documentation on it though.
I am not saying what is best, but other options would be a software raid like (newer) Windows storage spaces and (older) dynamic disks, on Linux LVM, is similar; if it is only a two-disk array, you can even get a cheap or not cheap raid card, or even less dependent is have 1 be a continuous sync to the other. (This would have the most performance downside, but the pro is it will have the smallest stack of technology when accessing the data on new hardware.