Hi Johnson, On Tuesday 23 August 2005 02:31, JohnsonCheng wrote: > It doesn't work, too. > Error message: Invalid argument. Well, do you have an mtdblock4 entry in /dev? Also, you should specify your filesystem type to mount, like in: mount -t jffs2 /dev/mtdblock4 /mnt BTW, -t jffs2 is just an example. HTH, -Scop.