使用华恒2410板子挂载U盘出现问题？请大家帮看看！

我在使用华恒2410板子挂载U盘时挂载不上，下面是我的详细步骤，请各位大虾帮分析分析：
首先我执行查看分区的命令~ # cat /proc/partitions
major minor #blocks name

8 0 1019903 scsi/host0/bus0/target0/lun0/disc
8 1 272218546 scsi/host0/bus0/target0/lun0/part1
8 2 269488144 scsi/host0/bus0/target0/lun0/part2
8 3 699181456 scsi/host0/bus0/target0/lun0/part3
8 4 10668 scsi/host0/bus0/target0/lun0/part4
由于无法确定U盘对应的是那个分区，我分别挂载了后四个分区，出错信息如下：
第一个分区：
mount /dev/sda1 /mnt
VFS: Can't find ext3 filesystem on dev sd(8,1).
VFS: Can't find ext2 filesystem on dev sd(8,1).
cramfs: wrong magic
cramfs: super.magic=ffffffff
cramfs: unsupported filesystem features
cramfs: root is not a directory
FAT: bogus logical sector size 65535
VFS: Can't find a valid FAT filesystem on dev 08:01.
VFS: Can't find a romfs filesystem on dev 08:01.
mount: Mounting /dev/sda1 on /mnt failed: Invalid argument
第二个分区：
mount /dev/sda2 /mnt
VFS: Can't find ext3 filesystem on dev sd(8,2).
VFS: Can't find ext2 filesystem on dev sd(8,2).
cramfs: wrong magic
cramfs: super.magic=ffffffff
cramfs: unsupported filesystem features
cramfs: root is not a directory
FAT: bogus logical sector size 65535
VFS: Can't find a valid FAT filesystem on dev 08:02.
VFS: Can't find a romfs filesystem on dev 08:02.
mount: Mounting /dev/sda2 on /mnt failed: Invalid argument
第三个分区：
mknod /dev/sda3 b 8 3
mount /dev/sda3 /mnt
VFS: Can't find ext3 filesystem on dev sd(8,3).
VFS: Can't find ext2 filesystem on dev sd(8,3).
cramfs: wrong magic
cramfs: super.magic=ffffffff
cramfs: unsupported filesystem features
cramfs: root is not a directory
FAT: bogus logical sector size 65535
VFS: Can't find a valid FAT filesystem on dev 08:03.
VFS: Can't find a romfs filesystem on dev 08:03.
mount: Mounting /dev/sda3 on /mnt failed: Invalid argument
第四个分区：
mknod /dev/sda4 b 8 4
mount /dev/sda4 /mnt
VFS: Can't find ext3 filesystem on dev sd(8,4).
VFS: Can't find ext2 filesystem on dev sd(8,4).
cramfs: wrong magic
cramfs: super.magic=ffffffff
cramfs: unsupported filesystem features
cramfs: root is not a directory
FAT: bogus logical sector size 65535
VFS: Can't find a valid FAT filesystem on dev 08:04.
VFS: Can't find a romfs filesystem on dev 08:04.
mount: Mounting /dev/sda4 on /mnt failed: Invalid argument
请大家帮我看看，不胜感激！