Hello,

I need to dump a NAND device (formatted to YAFFS2) in an image, then write this image to the NAND emulated device on a linux computer.

To get image, I have done a cat of the device:
cat /dev/mtd/mtd3 > <path>/yaffs2image.img
I get a 150 MB file. To write the image to the NAND emulated device, I do this:
modprobe mtdblock modprobe mtdchar

    modprobe nandsim first_id_byte=0x20
      second_id_byte=0x71

mount -t yaffs /dev/mtdblock0 /media/nand cat yaffs2image.img > /dev/mtdblock0
In result, /media/nand contents only a "lost + found" dir. But making a cat on mtdblock0 ouputs something which seems to be the contents of yaffs2image.img. I thought I retrieve the files of the original YAFFS2 device, including all its clusters.

Is there a way to get a dump of a YAFFS2 device, and to flash the dump to another device (emulated or not)?

Thanks.

-- 
Bounlith Sirivong.