Re: loader.conf and rootdev option for memory disk

I have my device working for now - but the question is - Is the documentation and example for “rootdev” right or not?

—
Mira

> On 18 Nov 2022, at 21:13, Warner Losh <imp@bsdimp.com> wrote:
> 
> 
> 
> On Fri, Nov 18, 2022 at 12:57 PM Chlasták Miroslav <mira@chlastak.cz <mailto:mira@chlastak.cz>> wrote:
> Hi all,
> 
> In the /boot/defaults/loader.conf are these options for memory disk settings:
> 
> #mdroot_load="YES"              # The "mdroot" prefix is arbitrary.
> #mdroot_type="md_image"         # Create md(4) disk at boot.
> #mdroot_name="/boot/root.img"   # Path to a file containing the image.
> #rootdev="ufs:/dev/md0"         # Set the root filesystem to md(4) device.
> 
> 
> But - is this example for rootdev option still right? Because “ufs:/dev/md0” works fine on freebsd 12.1, but on freebsd 12.3 this does not work and generates error message:
> 
> Can’t determine root device
> 
> 
> When I use this option with value “/dev/md0” or “md0” (even with this option commented out), so the machine boots correctly without any error.
> 
> I think you want vfs.root.mountfrom= instead of rootdev= here.
> 
> Warner
>  
> —
> Mira