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Date: Thu, 14 Sep 2006 09:32:19 -0700 (PDT)
From: Justin Treon <justin_treon@yahoo.com>
Subject: Re: JFFS2 ECC options
To: Davide CASCONE <davide.cascone@st.com>, linux-mtd@lists.infradead.org
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> I'm working with JFFS2 on a NAND device. In order to
> disable the software ECC is it enough to set the mtd
> field "nand.eccmode" to "NAND_ECC_NONE"? 
> If I do this, I have some CRC errors if JFFS2 file
> system includes a bad block. Is it right? Does the
> CRC check depend on the ECC options?
> 
> In order to use the summary support, is it enough to
> set the macro "CONFIG_JFFS2_SUMMARY" in the file
> ".config"? Do I have to re-make the file system
> image (that I create using the mkfs.jffs2 utility)
> in order to use it with the summary support?
> 

I have no idea about your first question.  You may
want to ask it again.  

Regarding summary support I have never been able to
make a jffs2 filing system that used summary support
with the mkfs.jffs2 tool that worked.  I create the
filing system with summary support on an empty chip
and then transfer the files. Please let me knhwo if
you get it to work with the mkfs.jffs2 tool.

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