How to recover from setting boot_single=""?

[Hauan, David]

> -----Original Message-----
> From: David Kurtz [mailto:davidkurtz at mac.com] 
> Sent: Friday, October 15, 2004 10:58 AM
> To: freebsd-questions at freebsd.org
> Subject: How to recover from setting boot_single=""?
> 
> 
> Short story: I placed a single line,
> 
> boot_single=""
> 
> into the previously empty file /boot/loader.conf and now my 
> machine boots with an extremely limited read-only volume.
> 
> How do I get my old boot behavior back?

try cntrl+d
that show bring you up to multi user mode
with read/write slices.


> 
> 
> Long story: I was muddling through updating the kernel and 
> world for the first time, going from FreeBSD 5.1 => 5.2. 
> Following instructions in /usr/src/UPDATING I made backups, 
> made buildworld, etc. until it got to the point where it says 
> reboot in single user.
> 
> Never having done that, I tried first by "reboot"ing, but for 
> some reason my USB keyboard doesn't get power until further 
> on in the boot cycle, so I couldn't just "press 4." I looked 
> through the docs and found instruction saying that I should 
> set boot_single. I'm guessing I should have set it to 
> something other than "", which is just copied from 
> /boot/defaults/loader.conf.
> 
> So, a couple more questions: what is this limited read-only 
> mode exactly? Where are my files (e.g. /usr is empty)? What 
> should I have done? Is it possible to back out?
> 
> It's a personal sandbox, and everything I need is already 
> safely backed up; if I need to just blast the whole system 
> with a CD install, I can do that. But I am curious to know if 
> it's possible to u-turn in this cul-de-sac. Apparently, I 
> know just enough to get myself into trouble, but not enough 
> to get out. _______________________________________________
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