thread Raid 1 (mirroring) on 2 drives is absolutely for domestics.
A backup to a single drive isn't a backup and I'm baffled why 'reputable' NAS people sell single drive options.
permalink Of course.
But at least it works at that scale. It is R, and it is an A. Generally the Ds are fairly I.

A single drive solution isn't R and isn't an A?
permalink Correct.
It's just something else that could fail messily.