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Re: Changing root journal data mode

Could you also just use tune2fs to change the journal type? I haven't
looked much at the docs for it but perhaps you could, since you use that
to actually make your fs ext3...

Curtis Hogg [buckminst inconnu isu edu]

So do the noble fall.  For they are ever caught in a trap of their own making.
A trap -- walled by duty, and locked by reality.  Against the greater force
they must fall -- for, against that force they fight because of duty, because
of obligations.  And when the noble fall, the base remain.  The base -- whose
only purpose is the corruption of what the noble did protect.  Whose only
purpose is to destroy.  The noble: who, even when fallen, retain a vestige of
strength.  For theirs is a strength born of things other than mere force.
Theirs is a strength supreme... theirs is the strength -- to restore.
		-- Gerry Conway, "Thor", #193
Email 1 - buckminst inconnu isu edu
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On Wed, 5 Sep 2001, Andreas Dilger wrote:

> On Sep 05, 2001  17:47 -0700, Mike Fedyk wrote:
> > I'm running 2.4.9-ac7 with ext3 compiled in, and I ran across this problem.
> > Now that I look back, it makes sence, but it wasn't obvious at first...
> >
> > I wanted to change the journal mode on my / partition, so I changed my fstab
> > to:
> >
> > /dev/hda1 / ext3 defaults,errors=remount-ro,data=journal 0 1
> >
> > as well as several other partitions, and rebooted.
> >
> > After rebooting I had a read only / that I couldn't remount rw, and couldn't
> > edit /etc/fstab without a boot disk.
> >
> > After scrolling up, I found output from mount saying to the affect "Can't
> > change journal mode while mounted".
> You need to specify on the kernel command-line "rootflags=data=journal".
> For lilo and syslinux, this is done with append="rootflags=data=journal".
> > I guess there would be a kernel boot option to change the journal mode for
> > /, but I haven't taken the time to look yet...
> >
> > Does it look like this will change, or are things staying like this?
> It may make sense to allow specifying the default data-journaling type
> in the journal superblock.  I suppose it depends also on whether shared
> journals (not implemented yet) will allow mixed-mode journaling, or if
> they will require the same journaling mode for all clients.  Andrew, Stephen?
> Cheers, Andreas

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