@musicmatze This is exactly my backup setup, but I bought a cheap Pentium SoC because RPis were such a nightmare with NixOS.
@clerie nice! I use raspbian, so it is ... well ... legacy linux, but okay.
I need the device powered on manually once a month (I will dump the pi with two USB HDDs at my parents), and I won't do more than ssh-login, mount the drive(s), start the backup from my drives and shut down the pi again. Maybe even less than once a month, so I guess that's not too much pain. I hope.
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