关于nandflash驱动一节，最后调试驱动时候的问题

我用的是天嵌linux-2.6.30 nfs起根文件系统
然后编译了香主nandflash的驱动，结果调试的时候出现下面问题，请高手解答
#mount -t yaffs /dev/mtdblock3 /mnt
yaffs: dev is 32505859 name is "mtdblock3"
yaffs: passed flags ""
yaffs: Attempting MTD mount on 31.3, "mtdblock3"
yaffs: auto selecting yaffs2
yaffs: NAND geometry problems: chunk size 2048, type is yaffs2, inbandTags 0
mount: mounting /dev/mtdblock3 on /mnt failed: Invalid argument