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Date: Wed, 23 May 2007 11:23:45 +0300
From: Semih Hazar <semih.hazar@indefia.com>
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To: Jonathan Kotta <jpkotta@gmail.com>
Subject: Re: trouble with mounting ext2/jffs2
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Jonathan Kotta wrote:
> # mount -t jffs2 /dev/mtdblock0 /mnt
> Cowardly refusing to erase blocks on filesystem with no valid JFFS2 nodes
> empty_blocks 0, bad_blocks 10, c->nr_blocks 2048
> mount: mounting /dev/mtdblock0 on /mnt failed
>   
Can you try to mount /dev/mtdblock0 after doing flash_eraseall /dev/mtd0 
(without -j)
As far as I see jffs2 doesn't like an empty flash with cleanmarkers. But 
it works fine with an all-empty flash. I think cleanmarkers are written 
as data is written.

Another (and maybe better ?) way to go is
* create a jffs2 image with mkfs.jffs2
* erase the flash with -j so that cleanmarkers are written
* and then use nandwrite to write your image to mtd.

Regards,
-- 
Semih Hazar