1、格式化U盘

第一步：在没有播放U盘时使用fdisk查看哪些设备

如：

# fdisk -l

Disk /dev/sda: 128.8 GB, 128849018880 bytes

255 heads, 63 sectors/track, 15665 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x000c5db2

Device Boot  Start End  Blocks   Id  System

/dev/sda1   *   1   15103   121307136   83  Linux

/dev/sda2   15103   15665 45189135  Extended

/dev/sda5   15103   15665 4518912   82  Linux swap / Solaris

第二步：播放U盘后再次使用fdisk查看

# fdisk -l

Disk /dev/sda: 128.8 GB, 128849018880 bytes

255 heads, 63 sectors/track, 15665 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O si