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I recently installed Xubuntu on a spare machine that is serving as a NAS, voice communication, and hosting various other services. I have a 120GB SSD containing the OS and 2 4TB drives configured as raid 1 using mdadm, that has all of my media. Everything seems to be working fine but what I am concerned about is, if one hard drive fails what are my recovery options? Also, if I pull a drive out, is it possible to mount it on another computer for recovery reasons?

Also how are upgrades handled with the software raid. When a new LTS version is released should I upgrade and will my array fail?

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