新裁剪的interl i3操作系统 为什么U盘识别了，却挂接不上？？

root@lec3230:/# fdisk -l

Disk /dev/hda: 1024 MB, 1024966656 bytes

16 heads, 63 sectors/track, 1986 cylinders

Units = cylinders of 1008 * 512 = 516096 bytes

Device Boot Start End Blocks Id System

/dev/hda1 * 3 1795 903168 83 Linux

Partition 1 does not end on cylinder boundary

/dev/hda2 1797 1986 95233 5 Extended

Partition 2 does not end on cylinder boundary

/dev/hda5 1797 1986 95232 82 Linux swap

Disk /dev/sda: 8086 MB, 8086618112 bytes

255 heads, 63 sectors/track, 983 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System

/dev/sda4 * 1 984 7896960 b Win95 FAT32

Partition 4 has different physical/logical endings:

phys=(982, 254, 63) logical=(983, 36, 13)

root@lec3230:/# mount -t vfat /dev/sda /mnt


mount: mounting /dev/sda on /mnt failed: No such device

换一块U盘试一试，还是这个情况，这是为什么呢？？？？！！！！

root@lec3230:/# fdisk -l

Disk /dev/hda: 1024 MB, 1024966656 bytes

16 heads, 63 sectors/track, 1986 cylinders

Units = cylinders of 1008 * 512 = 516096 bytes

Device Boot Start End Blocks Id System

/dev/hda1 * 3 1795 903168 83 Linux

Partition 1 does not end on cylinder boundary

/dev/hda2 1797 1986 95233 5 Extended

Partition 2 does not end on cylinder boundary

/dev/hda5 1797 1986 95232 82 Linux swap

Disk /dev/sda: 4004 MB, 4004511744 bytes

116 heads, 51 sectors/track, 1322 cylinders

Units = cylinders of 5916 * 512 = 3028992 bytes

Device Boot Start End Blocks Id System

/dev/sda1 1 1323 3910640 b Win95 FAT32

root@lec3230:/# mount -t vfat /dev/sda1 /mnt

mount: mounting /dev/sda1 on /mnt failed: No such device

root@lec3230:/# ls /dev/sd*

/dev/sda /dev/sda1 /dev/sdc

root@lec3230:/# mount -t vfat /dev/sda /mnt

mount: mounting /dev/sda on /mnt failed: No such device

总结问题原因：

解决方法：