when i write flash with yaffs2 i found the bigger logical chunk number has a smaller physical chunk number, and the 0# logical chunk number equal to the -1# physical chunk number.just as below shows when i try to write 12000 bytes to the flash which data area is 1984 bytes and oob is 64 bytes as i mod the driver. logical chunk number : physical chunk number 0:-1 1:4864 2:4865 3:4866 4:4867 5:4869 6:4868 is this corretly? ---- Regards, Ezio.