svn commit: r327890 - head/usr.sbin/bsdinstall/partedit

[Gary Jennejohn]

On Thu, 18 Jan 2018 07:26:11 +0000
Alexey Dokuchaev <danfe at FreeBSD.org> wrote:

> On Sat, Jan 13, 2018 at 06:53:47AM +0000, Alexey Dokuchaev wrote:
> > On Fri, Jan 12, 2018 at 08:25:57PM +0000, Ed Maste wrote:  
> > > New Revision: 327890
> > > URL: https://svnweb.freebsd.org/changeset/base/327890
> > > 
> > > Log:
> > >   bsdinstall: disable SUJ by default
> > >   
> > >   SUJ + cg checksums produce spurious warnings after an unclean shutdown
> > >   (e.g. a crash).  For now disable SUJ for UFS installs so installing from
> > >   a FreeBSD 12 snapshot results in a usable filesystem, until this can be
> > >   fixed.  
> > 
> > Thanks; I keep seeing it quite often.  Is it safe to disable SUJ on already
> > populated filesystem?  Can (should) it better be done on live, mounted one,
> > of better off the other booted instance of FreeBSD (from another media)?  
> 
> Ping.
> 

The answer to your question is in tunefs(8).

Snippet:

The tunefs utility is designed to change the dynamic parameters
of a UFS file system which affect the layout policies.  The
tunefs utility cannot be run on an active file system.  To change
an active file system, it must be downgraded to read-only or
unmounted.

-- 
Gary Jennejohn