制作文件系统的问题

按教程制作了一个文件系统，发在开发板中运行，出这样的错误，请高手指点一下
yaffs: dev is 32505858 name is "mtdblock2"
yaffs: passed flags ""
yaffs: Attempting MTD mount on 31.2, "mtdblock2"
yaffs: auto selecting yaffs2
block 114 is bad
block 918 is bad
yaffs_read_super: isCheckpointed 0
VFS: Mounted root (yaffs filesystem) on device 31:2.
Freeing init memory: 232K
/etc/init.d/rcS: line 6: unask: not found
/etc/init.d/rcS: line 13: nkdir: not found
/etc/init.d/rcS: line 15: /bin/hostname: not found
can't open /dev/tq2440_serial0: No such file or director

1、can't open /dev/tq2440_serial0: No such file or director这个的解决参考TQ2440配套的Linux移植手册的12.1章节
2、
/etc/init.d/rcS: line 6: unask: not found
/etc/init.d/rcS: line 13: nkdir: not found
/etc/init.d/rcS: line 15: /bin/hostname: not found
这三行的错误都是命令找不到，建议你确认一下你的busybox在配置时是否添加了这些命令。