Re: A little question about safe mode

First, I see "safe mode" mentioned in the subject, but nowhere in the body of
the message?  So, what's up with the safe mode? :-)

on 18/10/2012 10:35 Alexander Yerenkow said the following:
> Hello there.
> I have problem here, and don't know if it's bug or "feature" :)
> If I prerare boot media (hdd, sd card,usb, etc) with FreeBSD, and NOT
> create there fstab, I see such behavior:
> 
> 1. I need enter manually where from mount root (e.g. ufs:ada0s1a or
> ufs:ada0s1a rw)

This is a feature.
You might want consider using options ROOTDEVNAME in your kernel.

> 2. If I enter ufs:ada0s1a rw - I have / mounted in read-only anyway. <== Is
> this bug?...

It looks like a feature.  The low-level mountroot code always mounts / as r/o.
It's supposed to be later remounted as r/w by rc.d/root script.

> 3. If I try to make it rw, with commands
> mount -o rw -u /dev/ada0s1a /
> there is no errors, but root is still RO.

This sounds like a bug.
Is there anything on the system console?

> 4. I can't umount / remount some elsewhere this disk, just to create fstab
>  (it's already mounted and can't be updated).
> 
> So, is this as-by-design, that you need "any other" media to boot, just to
> create fstab, or there is "rw" mode broken, or I just missed something?
> 
> It's very disappointing to be able boot interactively into system, but have
> no way to "fix" fstab to make it non-interactively bootable :)

You can try to create an md-based filesystem, mount it under /mnt and then
unionfs-mount it over /etc.

-- 
Andriy Gapon