On 07/09/2020 14:38, druck wrote:
> You shouldn't need to, I upgraded my whole dozen strong collection
> including every generation of Raspberry Pi, from Stretch to Buster, and
> didn't loose any of them.
>
> When promoting a card to a later machine, I've occasionally found a
> newer kernel and startX.elf isn't present, using rpi-update on the older
> machine before moving the card fixes that.

I found the boot partition was too small for all the latest raspberry pi
4 stuff when I upgraded my Raspberry pi 2 to Buster.
It runs Raspberry pi 2 compatible buster fine though, just doesn't have
all the latest boot files for the raspberry pi 4, which doesn't really
matter in my case since it's just a very low traffic web server that can
stay on the Raspberry Pi 2 for now.

Actually I think it would boot on a Pi 4, it just doesn't have the
latest power optimization stuff.

--
Brian Gregory (in England).

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