There is a 1GB NAND flash ( from Micron) on my MX6Q board.
Its partitions are /dev/mtd2 ( for kernel) and /dev/mtd3 ( for rootfs).
When erasing with 'flash_erase /dev/mtd3 0 0',
everything goes well.
However, when erasing with 'flash_erase -j /dev/mtd3 0 0 '
for JFFS2 fs, I got the following error:
flash_erase: error!: Eeep. Autoplacement selected and no empty space in oob.