Re: HEADS UP: SUJ Going in to head today

On Sunday 25 April 2010 19:47:00 Scott Long wrote:
> On Apr 24, 2010, at 8:57 PM, Jeff Roberson wrote:
> > On Sun, 25 Apr 2010, Alex Keda wrote:
> >> try in single user mode:
> >> 
> >> tunefs -j enable /
> >> tunefs: Insuffient free space for the journal
> >> tunefs: soft updates journaling can not be enabled
> >> 
> >> tunefs -j enable /dev/ad0s2a
> >> tunefs: Insuffient free space for the journal
> >> tunefs: soft updates journaling can not be enabled
> >> tunefs: /dev/ad0s2a: failed to write superblock
> > 
> > There is a bug that prevents enabling journaling on a mounted filesystem.
> > So for now you can't enable it on /.  I see that you have a large /
> > volume but in general I would also suggest people not enable suj on /
> > anyway as it's typically not very large.  I only run it on my /usr and
> > /home filesystems.
> > 
> > I will send a mail out when I figure out why tunefs can't enable suj on /
> > while it is mounted read-only.
> 
> This would preclude enabling journaling on / on an existing system, but I
> would think that you could enable it on / on a system that is being
> installed, since (at least in theory) the target / filesystem won't be the
> actual root of the system, and therefore can be unmounted at will.

It worked here - it's shown as enabled after I booted in single-user mode and 
enabled it yesterday:

core# dumpfs / | grep -i journal
flags   soft-updates+journal

-- 
Bruce Cran