Subject: Re: Log area on-disk for the journal
To: Pavel Cahyna <>
From: Jason Thorpe <>
List: tech-kern
Date: 10/23/2006 20:13:11
On Oct 23, 2006, at 2:28 PM, Pavel Cahyna wrote:

> ext3 does not have this problem. Old tools know if the journal is  
> dirty,
> refuse to work if it, and work correctly if it is clean.

That's because the "old tools" are actually new tools -- they know  
about the journal.

> Maybe FFS could imitate this by writing an incompatible magic number  
> to the
> superblock if journalling is in action, and when the filesystem is  
> cleanly
> unmounted, replace it with the old magic number.

...of course the superblock update has to be journaled... :-)

> Pavel

-- thorpej