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)

So effectively light enough that it could run on a raspberry PI 4. Well that would put you under 10W

Well the first question is what software you NEED to run, then we can figure out hardware.

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

The big companies are ignoring the sector and just plan on buying the most profitable startups that look promising.

So ignore the fortune 1000 entirely and invest in smaller companies that are hiring engineers in chemistry if your goal is to invest effectively in battery technology.

But you are missing the advances in metallurgy (superconducting metals are making great strides), mechanical engineering (flywheel technology is taking advantage of new micro-controlled magnetic bearings) and physics.

well as you can buy solar panels at $0.50/W so a 10W panel can be obtained for $5 and a raspberry pi4 only uses 2.7W while idle and 6.4W when under full load.

Efficient is sexy

I guess a discussion on shared meaning of what it means to die would be needed to understand if not dying as possible future/current/previous state in the universe and directly address your request to change your mind.

foolish of you to think that is a bad thing.

There is no greater hell than immortality.

Really looking forward to seeing this packaged in Guix

Doom stops when people have hope. Teaching people how to climb to a solar punk future is the solution.

We need solar punk political candidates.

in every sense of the word.

Full source code control, nothing included that you don’t ask for, substitutes for those wanting to reduce energy requirements as a collective group.

Oh and can be productively used on a system powered exclusively by a $5 solar panel.

They may wish to look into Gnu Guix (and possibly nonguix channels depending on their needs)