UBIFS was Re: Compressed file system for SD?

Michael 'Mickey' Lauer mickey at openmoko.org
Mon Oct 13 20:29:04 CEST 2008

Am Monday 13 October 2008 02:14:06 schrieb nickd:
> Bummer. Upon further reading I see the difference in flash devices now.
> Do you think UBIFS could replace JFFS on the Freerunner? Is there a
> benefit? Or is there not enough wiggle room on the FR for caching? It
> seems better overall [1]. Would it be possible to replace it yourself
> with the appropriate kernel modules etc?
> Ok enough questions ;-)
> -Nick
> 1. http://lwn.net/Articles/275706/
> Lorn Potter wrote:
> > nickd wrote:
> >> I haven't sorry. Coincidentaly, the new kernel which was released the
> >> other day (.27) includes a new filesystem designed for flash drives -
> >> UBIFS [1]. I wonder if this could be relevant to this project. It looks
> >> like it has full write-back support, meaning it doesn't need to write to
> >> the SD card all the time, although I guess we don't have that much
> >> memory to play with.
> >
> > ubifs wont work on sd cards, which are not true flash devices.
> > but it is relevant and could replace jffs2.

As could yaffs2. Missing "just" someone compiling an image and doing some 
benchmarks. With OE it should be easy.


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