Warzone 2100 (you can download for free as it is an old PC game that went GPL)

gets more on the nose by the day

a search engine for the gemini network protocol

https://en.wikipedia.org/wiki/Gemini_(protocol)

gemini://gemplex.space/search

have 2 flash/hard/whatever drives: A and B

once a month (or at what ever frequency you can sustain)

backup your data to A and next cycle backup your data to B

nothing fancy or technical, just some basic consistent backups.

if you can do that you’ll likely be fine. There are nearly infinitely many enhancements you can do if you are more technical or can follow technical instructions.

Raid stopped being optimal now that btrfs and ZFS exist.

If you plan on doing matching drives ZFS is recommended

If you expect mismatched disks, btrfs will work.

If you are most worried about stability get a computer with ECC memory.

If you are most worried about performance, use SSD drives.

If you want a bunch of storage for cheap, use spinning disks (unless you exceed the 100TB capacity range)

Your ZFS backup strategy should be to follow one of the following rulesets:

3-2-1 [3 copies of the data at 2 different locations for the 1 purpose of preserving the data]

4-3-2-1 [4 copies of the data at 3 different locations in 2 different types of media for the 1 purpose of preserving the data]

5-4-3-2-1 [5 copies of the data at 4 different locations across 3 different continents in 2 different types of media for the 1 purpose of preserving the data]

The details of the backup is more if you have a second system to enable ZFS send/receive or if you have to transport deltas from ZFS send

Efficient is sexy

Really looking forward to seeing this packaged in Guix

in software these days it is: good, cheap or fast; pick one (if you are lucky [usually things are just bad, expensive and slow as f&*k])