[ECOS] Re: Simple flash filesystem?

["Grant Edwards" <grante at visi dot com>]

Kristian Otnes writes:

[excellent analsys of problem]

> Alas, it is hard to find any free and good system on the
> net... I couldn't when I needed it. The Journalling flash file system
> (http://www.developer.axis.com/software/jffs/) is possibly one
> candidate, but it is for Linux (maybe portable). I don't know
> the situation of its overall performance and recovery mechanisms...

I found jffs and a couple other journalling approaches to implimenting
a block device underneath a Unix or DOS filesystem, but they all seemed
way too big/complex when my filesystem isn't going to be more than a few
hundred KBytes and will be rarely written to.  For now, I'm going to try
to use a ROM filesystem and have users download the whole directory
tree when a file changes.

It could be worse, I could ask them to link the files as data with the
application code and eCos.

Maybe in phase II (AKA: the list of things that will never get done)
I'll come up with a simple flash filesystem for my situation: writes
are rare and are allowed to block reads for a long time (several seconds).

-- 
Grant Edwards
grante@visi.com