Re: From UFS to ZFS as root on RBPI4

Thanks for pointers. 

Will start soon this and report back my progress. The idea would be to have a ready freebsd microsd image with ZFS installed by default

Best Regards,
Stefan Parvu

> On 21. Aug 2022, at 19.12, John Kennedy <warlock@phouka.net> wrote:
> 
> On Fri, Aug 19, 2022 at 01:38:56PM +0300, Stefan Parvu wrote:
>>> My RPI4 8GB runs on ZFS on a USB-disk.
>> Would this work for another microSD card, as well, I bet. Right?  
>> Boot from the microSD card and plug-in via USB another microSD card, repeat the procedure and build sort of FreeBSD 13.1 with ZFS root on microSD.
>> Are there any problems why ZFS wont work for a microSD card ?
> 
>  I've done ZFS on SD and much smaller RAM sizes on older RPIs when it
> was arguably way more painful.  I'd probably recommend doing a
> bsdinstall onto the USB-attached SDcard, but the RootOnZFS page is what
> I used back when that was a new thing.
> 
>  Two things I'd definitely do differently are:
> 
>  1:  Having your swap be a real, proper swap partition (if you do hit
>    your swap hard, you really don't want disk buffering messing
>    up your performance, plus it's always nice to get kernel
>    dumps if you ever want to contribute that way).
>  2:  Break out /usr/obj/usr into it's own dataset/filesystem.  If you
>    compile your own kernel+world, that is where the objects end up
>    and if you do things like boot-environments, that'll really blow
>    up the size for something you probably won't care about.
>