[GLLUG] Mac 10.2.2 Journaling

Sean picasso@madflower.com
Wed, 13 Nov 2002 15:47:06 -0500 (EST)

>From my understanding, it doesnt actually convert HFS+ to HFS(journaled) 
and convert the filesystems. It is totally backwards compatible because it 
is done in software above the filesystem if that makes sense. Thus the 
journaling is actually done in HFS+ and you can turn it on or off at the 
command line or through the gui on a whim. 

The difference is that it isnt changing the filesystem, it is running in
the OS filesystem driver. 

It gets more complicated then that because if you recall the "mac" rom'd 
drives. The rom for those was the OS driver and that is now written on a 
partition on the drive.. so it is probably just replacing that which it 
can do on the fly although you have to reboot for it to take effect. 

I would have to look at it closer, I kind of fell out of the development 

On Wed, 13 Nov 2002, Jo Dillon wrote:

> On Wed, Nov 13, 2002 at 01:41:03PM -0500, Sean wrote:
> > Has anyone turned on the Journaling feature of Mac OS 10.2.2, 
> > I kind of wondered what the speed hit and other disadvantages i might 
> > encounter before I started mucking with it. I am kind of leary since you 
> > don't have to reformat. 
>   Why would that make you leary? Ext2 to Ext3 conversion is the same.
> Having said that i haven't tried journalling on my OS X box myself ;)
> > Sean 
> > 
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