Ah, My bad then, I was assuming ext3 did NOT do journalling.  Also, ext3 is what the instructions say to use to generate an mmc card image.  So now the question is, how robust is ext3's journaling mechanism?  I was under the impression that journalling would take care of the problem associated with file system corruption when power goes away during a write. Is that not the case though?

I've only very recently started to dig into the file systems and which to use here at work with our current project. I've sort of been leaving that for the end as I've been assuming that it won't impact how anything works, overall, except for file integrity and the ability to recover with fsck.


jffs2 is designed to be used on raw NAND (like the internal NAND
memory that comes with the Overo). I don't think it will work on an
MMC card. The MMC cards have their own internal wear leveling
algorithims etc.

You'd probably want to look at EXT3, which does journalling and could
be used on an MMC card.

There is a newer file system, called UBIFS, which we're just starting
to look at at work, so I'm not sure if it's a candidate for MMC cards.
I know that it's layered, and will definitely work on raw NAND.

Dave Hylands
Shuswap, BC, Canada

Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day
trial. Simplify your report design, integration and deployment - and focus on
what you do best, core application coding. Discover what's new with
Crystal Reports now.  http://p.sf.net/sfu/bobj-july
gumstix-users mailing list

Say you can or say you can't, either way you will be right.
Computers are like old testament gods: Lots of rules and no mercy.