Configuration: 4x1TB HDDs added into a storage space in Windows10 with 2-way mirroring, resulting in 2TB storage (so, I believe, "software-RAID10"):
screenshot of the setup
The question is – once I re-install my Windows copy to either Windows10 or whatever goes after it in future, what happens to my software RAID?
Would Windows10 just pick it up automagically or would it need additional actions from my side?
If I install some other OS (e.g. Unix-based) – would it be the same? What happens to the data stored? Any way to help myself avoiding problems beforehand with this setup?
Best Answer
You have set up a proprietary storage technology called "Storage Space" in your system. Regardless what this is supposed to do internally ("software-RAID10" as you thought) or anything else, the on-disk format has not been disclosed.
I pretend that currently (24.8.2021) no unix-like operating system is able mount, read and write to it.
As for a Windows 10 operating system I would expect that to be recognized.
Avoid that technology. The forums are full of people searching for help with their broken "Storage Spaces" stuff.
Do a search to check availability and price of recovery software for "Storage Space" (if any at all).
Better use open source products. 2-way-mirroring is not a backup replacement.