Running the Pi from a read-only filesystem would prevent shutdown problems.

https://www.raspberrypi.org/blog/adafruits-read-only/



On Mon, Feb 19, 2018 at 1:22 PM, John R. Hogerhuis <jho...@pobox.com> wrote:

>
>
> On Mon, Feb 19, 2018 at 10:04 AM, megarat <mega...@yahoo.com> wrote:
>
>>
>> A good counter-argument to this is that if using a computer as a
>> foundation for building your new device is the easiest, cheapest, and/or
>> quickest way to do it, then those benefits might be worth the cost of
>> having the computer involved.
>>
>>
> I'd agree with that.
>
> The Pi is also small and a popular platform. Lots of support and
> peripherals. It kind of future proofs us. It makes it possible to extend
> the system yourself or with applications written by others.
>
> But for that same reason there's a lot of stuff to "turn off" or configure
> for our purpose and possibly some hardware beyond just the I/O to make it
> stable.
>
> Persistent linux filesystems are not compatible with being hard power
> cycled. Journaling filesystems help but even those seem to get corrupted in
> my experience.
>
> https://github.com/wware/rpi-shutdown
> https://hackaday.io/project/25107-single-supercapacitor-
> ups-for-raspberry-pi
> https://www.pi-supply.com/product/pi-ups-uninterrupted-
> power-supply-raspberry-pi/
> https://www.modmypi.com/raspberry-pi/power-1051/ups-boards-1051/ups-pico
>
> -- John.
>

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