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Re: ext3 to ext2 conversion causes kernel panic



On Fri, Dec 13, 2002 at 08:44:41PM +0000, Sean Neakums wrote:
> commence  Wolfgang Auer quotation:
> 
> > I try to convert my RedHat 7.3. partitions from ext3 to ext2. I have
> > found a thread dealing with this issue.
> > Thus: "tune2fs -O ^has_journal /dev/foo" and "e2fsck /dev/foo" will do
> > the magic!
> 
> You should probably use tune2fs -j /dev/foo instead.

And make sure you upgrade to the latest version of e2fsprogs.  RedHat
7.x probably has a somewhat old version of e2fsprogs, and you'll be
much happier upgrading to a newer version.

> > This works fine for "/boot" but when I try to convert "/" my
> > kernel panics? The kernel panics message appears shortly after the
> > attempt to startup kjournald.
> > How can I prevent the kernel panic?
> 
> You are umounting the FSes before you convert them first, right?  If
> you want to convert your root fs, you'll need to boot from a rescue
> disk or somesuch.

Also what's this about "attempt to startup kjournald"?  That only
happens when you attempt to mount an ext3 filesystem, and that only
happens when reboot the system.  (We don't support changing filesystem
types as part of a remount operation.  Did you try to mount the root
filesystem as ext3 when it was already mounted as ext2, by any chance?
Don't do that....)

						- Ted





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