>-----Original Message-----
>From: Charles Manning [mailto:manningc2@actrix.gen.nz] 
>Sent: Monday, September 11, 2006 6:56 PM
>To: yaffs@lists.aleph1.co.uk
>Cc: Sohn Chung-MCG31424
>Subject: Re: [Yaffs] overwrite problem in yaffs2?
>
>On Tuesday 12 September 2006 00:47, Sohn Chung-MCG31424 wrote:
>> Hello,
>>
>> I am using the latest yaffs2 release + Sergey's patch on Large page
>> NAND.
>>
>> I got some data corruption on the yaffs2 filesystem when an 
>application
>> program overwrite data into the file. So I configured the 
>yaffs2 code to
>> check every page before
>> it wrote on NAND flash. I also added code to stop the system 
>if yaffs2
>> tried to write
>> on Nand flash that wasn't erased in  
>yaffs_WriteNewChunkWithTagsToNAND.
>>
>> I wrote a quick overwrite test program to test this problem.
>> While running the test, this message was showed up.
>>
>> Chunk 87680 not erased
>> **>> yaffs chunk 87680 was not erased
>
>I this could be a yaffs problem, I think it much more likely 
>that this is a 
>lower-level driver problem.

I didn't have any problem when I ran the same test on a 128MB small page
NAND.
I am using the same lower-level driver and the yaffs2 source on both
Small Page NAND and Large Page NAND.

One other thing is that if I ran the write (copy) test instead of the
overwrite test, I didn't see this problem
on a Large Page NAND.

Do you still think it is a lower-level driver problem?

Chung


>
>-- CHarles
>