Re: Cannot mount / from UFS labels

On Fri, 21.08.2009 at 15:23:58 -0500, Rick C. Petty wrote:
> On Fri, Aug 21, 2009 at 08:02:02PM +0200, Ulrich Spörlein wrote:
> > On Fri, 21.08.2009 at 18:07:00 +0200, Ulrich Spörlein wrote:
> > > On Fri, 21.08.2009 at 09:41:30 -0500, Rick C. Petty wrote:
> > > > On Fri, Aug 21, 2009 at 03:17:23PM +0200, Ulrich Spörlein wrote:
> > > > > # tunefs -L root / (in single user)
> > > > > then updated /etc/fstab and rebooted
> > > > 
> > > > Was / mounted read-write at the time?  After the tunefs, you should have
> > > > seen some messages on the console related to the labels.
> > > 
> > > Not quite, the dmesg spammage has been quenched in RELENG_8 and the
> > > label *did* show up in dumpfs and /dev/ufs. But I now tried again, and
> > > re-mounting the / filesystem r/w makes the label go away.
> > > 
> > > So I guess I need to boot a live system first and have the label created
> > > from "outside". Now where is that USB stick ...
> > 
> > Just to clarify, this worked.
> > 
> > What's broken is tunefs on / in single user mode. The change is seen by
> > dumpfs but will not survive a reboot. I guess that's ok, though.
> 
> You didn't explain whether you had / mounted read-only or read-write.
> Also, it probably matters how you got into single-user mode ("shutdown now"
> vs. option 4 from boot2).  Also, the fact that it's mounted might be the
> issue.  I'm not sure I would claim this as "broken", although I can't see
> any reason a read-only mount is prevented from tuning (at least changing
> the volume name).

Hello, it went like this:

boot -s

tunefs -L root /
dumpfs / | grep volname  (volname is set!)
mount -uw /
dumpfs / | grep volname (volname is not set!)

Regards,
Uli