linux-2.6.30.4文件系统问题

我按照天嵌最新版移植手册做完第11步构建文件系统，焼写到开发板中，内科启动出错，打印信息如下：

hub 1-0:1.0: 2 ports detected Menu  #####
[r] Reboot u-boo
mice: PS/2 mouse device common for all mice
S3C24XX RTC, (c) 2004,2006 Simtec Electronics
S3C2410 Watchdog Timer, (c) 2004 Simtec Electronics
s3c2410-wdt s3c2410-wdt: watchdog inactive, reset disabled, irq enabled
Advanced Linux Sound Architecture Driver Version 1.0.20.
ALSA device list:
  No soundcards found.
TCP cubic registered
NET: Registered protocol family 17
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
drivers/rtc/hctosys.c: unable to open rtc device (rtc0)
yaffs: dev is 32505858 name is "mtdblock2"
yaffs: passed flags ""
yaffs: Attempting MTD mount on 31.2, "mtdblock2"
yaffs_read_super: isCheckpointed 0
VFS: Mounted root (yaffs filesystem) on device 31:2.
Freeing init memory: 120K

mdev: /sys/block: No such file or directory
mdev: /sys/class: No such file or directory

找了几天都不知道错在哪，请大家帮我看看，不胜感激！

1# coco81925
没看到分区信息啊？？

1# coco81925

貌似手册里面的，没有建立block 和 class的项

应该是文件系统制作出错了导致的。