Homelabs fail in specific, dateable ways. This is a running record of what broke, how it was actually diagnosed, and the exact fix — not generic best-practice advice.
The rpi-clone PARTUUID trap: why your Pi 4B silently refuses to boot from a cloned SSD
rpi-clone copies your SD card to a USB SSD beautifully, but it does not update the root=PARTUUID reference in the destination's cmdline.txt. Flip the boot order before catching this and your Pi either boots the wrong ...