Hi,
You should look into the kernel source code to find the solution. For example, I am using linux kernel 2.6.29.3. Come to driver/mtd/nand/,
and read into nand_base.c. You see that:

static struct nand_ecclayout nand_oob_64 = {
     .eccbytes = 24,
     .eccpos = {
            40, 41, 42, 43, 44, 45, 46, 47,
            48, 49, 50, 51, 52, 53, 54, 55,
            56, 57, 58, 59, 60, 61, 62, 63},
     .oobfree = {
         {.offset = 2,
          .length = 38}}
};

Is that your NAND which has 64 bytes in OOB ? And you are using this definition for your NAND ?
If the offset = 2  then you can be use command "mkyaffs2image  /tmp/test/ /tmp/yaffs2.img   2".
So offset = x, using:
mkyaffs2image  /tmp/test/ /tmp/yaffs2.img   x

Make clearly what is your definition of your NAND 's OBB.
Best, regard
________________________________
Từ: yichia lan <lanyichia@yahoo.com>
Đến: dthang_dao@yahoo.com
Cc: yaffs@lists.aleph1.co.uk
Gửi ngày: Thứ Hai, 2 tháng 11, 2009 12:12:03
Chủ đề: Re: [Yaffs] A Three YEARs Problem!!!-----Can not see file afterwrite yaffs2 image on NAND 


>>Hi 

>>Thank you for your reply.
>>I'm trying to use another yaffs2 branch source, and patch it as you offered.
>>Now, there is no segmentation.
>>But, after  nandwrite -a -o /dev/mtd0  yaffs2.img, and mount it to /mnt/nandyaffs2
>>There still only  "lost+found" . 

>>I can new files and new folders in /mnt/nandyaffs2 after mount the nand.
>>But I can not nandwrite a yaffs2 imge into NAND and get only lost+found.
>>Why? 
>>Confused!!!!!

>>My English is not good either, and thank you for your patience.

>>Best Regards.


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