"Brian Gregory"  wrote in message
news:hrl8niFr544U1@mid.individual.net...
> On 04/09/2020 21:31, NY wrote:
>> - Can a "system disk" SD card (ie the same disk image) for 3B+ be used
>> for a 4B?
>
> Yes, as long as the version of Raspberry Pi OS (aka Raspbian) supports the
> Raspberry Pi 4. In other words it must be pretty recent.

My Pi 3B+ has Raspbian Stretch which I believe is one "level" below the
current Raspbian Buster. I wish computer companies would go back to using
version *numbers*, instead of Ubuntu Bionic Beaver, Android Jelly Bean or
Raspbian Stretch. At least Ubuntu uses consecutive letters of the alphabet
so Bionic Beaver is one version before Cool Cat and two before Dirty Dog (or
whatever!).

It's not the end of the world if I have to reinstall from scratch. I had to
do it a while ago when my Pi suddenly stopped booting after I'd done a clean
restart (not even a shutdown, and certainly not an unclean loss of mains).
After trying all the remedies that Google offered, I cut my losses and
reinstalled it, making copious notes of what I'd installed and any
configuration tweaks, in case I needed to do it again. I also started making
a disk image of the card every few months so I could go straight back to a
reasonably recent state without needing to reinstall. That card image will
be my initial system disk for my new Pi 4; all I need to do is to remember
to change the /etc/hostname and /etc/hosts entry to give the new Pi a
different name.

Grrr. Just realised I'll need to buy either a mini-HDMI to full-size-HDMI
converter or else a longer mini-to-full HDMI cable, so the Pi can reach the
telly which I'll be using as a monitor - when I'm not accessing the Pi's
desktop remotely using VNC.

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