Hi,

             I am using arm cortex A9 board with 256MB NAND device ( 2KB page size and 128K erase size)

             In barebox I have created a NAND partition of size 2MB

             I have compiled kernel 3.2.54 with yaffs2 support and NAND ECC used is BCH 8 bit.

             Below are the YAFFS2 config

            CONFIG_YAFFS_FS=y
            CONFIG_YAFFS_YAFFS1=y
            # CONFIG_YAFFS_9BYTE_TAGS is not set
            # CONFIG_YAFFS_DOES_ECC is not set
            CONFIG_YAFFS_YAFFS2=y    
            CONFIG_YAFFS_AUTO_YAFFS2=y
            # CONFIG_YAFFS_DISABLE_TAGS_ECC is not set
            # CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED is not set
            # CONFIG_YAFFS_EMPTY_LOST_AND_FOUND is not set
            # CONFIG_YAFFS_DISABLE_BLOCK_REFRESHING is not set
            # CONFIG_YAFFS_DISABLE_BACKGROUND is not set
            # CONFIG_YAFFS_DISABLE_BAD_BLOCK_MARKING is not set
            CONFIG_YAFFS_XATTR=y

           I have followed the below steps

            1.       On host machine I have created yaffs2 files with the  command as shown below
 
                                mkyaffs2image   ./dir_yaffs2    file.yaffs2
 
            2.       On target machine , I  flashed the yaffs2 file on the 2MB partition as below:
 
                       nandwrite -p /dev/mtd4 file.yaffs2
 
            3.      I have mounted the yaffs2 partition as shown below
 
                                mount   -t yaffs2   /dev/mtdblock4   /mnt/partition_yaffs2
 
            

The mounted yaffs2 partition does not show the contents of the dir_yaffs2  directory.

Once mounted, normal copy,delete, operations can be done on the mounted YAFFS2 partition and data is persistant.

Regards

Abdul Moiz