On Oct 22, 2006, at 10:35 PM, Michael van Elst wrote:

> You may need to transport the disk to an older system and you
> may want to run the same filesystem without journaling.

then you should disable journaling on the file system before  
transporting it.

>> Old tools don't know how to tell if a journal is dirty.
>
> True, the journal would be lost.

It's not just the journal -- if you can't recover the journal, you  
can't even be sure that the file system is fsck'able.

-- thorpej