shizheng: 
	Thanks for your reply.
	The chipsize is 64MB and the pagesize is 2048B.  /dev/mtdblock0 can
be mounted correctly.  Then I did following options :
	# touch a
	#ls 
	file a is created
	#echo "abc" > a
	#cat a
	the content of file a is "abc"

	but, if I use the vi command, eg. vi a , the kernel report errors as
mentioned before.    

I checked the code.In file file yaffs_mtdif2.c, it is required that the both
the tags and data field are not null in function
nandmtd2_WriteChunkWithTagsToNAND. When the system reports error, the data
parameter is NULL. 

I have use an old version yaffs in Linux2.6.16, all things works.  
Any suggestion?

Best wishes.

LiuShu

-----邮件原件-----
发件人: shizheng [mailto:neversetsun@ustc.edu] 
发送时间: 2008年7月18日 15:15
收件人: YAFFS
抄送: liushu
主题: Re: [Yaffs] yaffs2+nandsim problem

What's the size of nand flash when you use nandsim?
I found that the question is due to the emulated flash size.
The nandsim sucks when size is too large. Maybe you can check the allocation
statement in nandsim.

On 2008-07-16 03:48, liushu wrote:
> Hi,
> I have got a similar question with yaffs_nandsim problem reported by 
> shizheng and HyoGi sim in May, 2008. I use yaffs in Linux 2.6.23. The
kernel
> bug happened at fs/yaffs2/yaffs_mtdif2.c:63!
> How can I fix the bug?Thanks.
>
> Best Wishes.
> LiuShu
>