Cramfs on NAND

Sean Kelley sean.sweng at gmail.com
Fri Mar 17 21:43:17 EST 2006


So is a NAND based FTL for linux encumbered with patents/licensing by M-Systems?

Sean

On 3/10/06, Russ Dill <russ.dill at gmail.com> wrote:
> > > I hear that cramfs on NAND flash is not a good idea because of the bad
> > > blocks. Is this still true? There was talks some time  ago about making
> > > cramfs work on top on NAND.
> > > <http://lists.infradead.org/pipermail/linux-mtd/2004-May/009784.html>
> >
> > Yes, it's still true.  CRAMFS expects it's data to be contiguous so
> > unless you have something similar to a flash translation layer that
> > hides the bad blocks, insanity will ensue.
> >
> > > If this is true, are there any recommendations of what other fs to use.
> > > I already have one partition of jffs2 to store read-write files.
> >
> > Could you use a read-only JFFS2 partition?
>
> The other solution is to use an ftl ontop of the flash, and then put a
> cramfs on that. Of course, that depends on you living somewhere where
> algorithms are not restricted to those with the license to use them.
> (iirc)
>
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