mtdblock 设备无法找到?

lianglinux

hi,有没有用过mtd的朋友，我在mount /dev/mtdblock2设备的时候发生错误：no such device,可是我的mtd已经驱动上了并且erase /dev/mtd2也成功了．为什么还会提示没有找到mtdblock2呢？
cat /proc/mtd

dev:    size   erasesize  name
mtd0: 00020000 00020000 "BoardCfg"
mtd1: 00020000 00020000 "Kernel Image"
mtd2: 003c0000 00020000 "JFFS2 file System"

erase /dev/mtd2
........

mount -t jffs2 /dev/mtdblock2 /mnt
mount: Mounting /dev/mtdblock2 on /mnt failed: No such device



flash芯片:intel 文件系统：jffs2