HEADS UP: SUJ Going in to head today

[Scott Long]

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.

Scott