U盘被分成几个分区的恢复

我用df -lh命令看了下，被分成了四个。具体如下：

/dev/sda1             1.9G  4.0K  1.9G   1% /media/9F15-2076
/dev/sda6             1.9G  4.0K  1.9G   1% /media/A070-1636
/dev/sda5             1.9G  4.0K  1.9G   1% /media/A002-176E
/dev/sda7             1.9G  4.0K  1.9G   1% /media/A0CE-2BB4

首先，查看挂载位置，使用命令fdisk -l，查看到U盘的挂载位置如下：

Disk /dev/sda: 8074 MB, 8074035200 bytes
255 heads, 63 sectors/track, 981 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: 0xe4d2e4d2

Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1         245     1967931    7  HPFS/NTFS
/dev/sda2             246         981     5911920    5  Extended
/dev/sda5             246         490     1967931    7  HPFS/NTFS
/dev/sda6             491         735     1967931    7  HPFS/NTFS
/dev/sda7             736         981     1975963+   7  HPFS/NTFS

然后，要进行的步骤是删除分区。使用命令：

[root@direwolf  wolf]# fdisk /dev/sda

WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
switch off the mode (command 'c') and change display units to
sectors (command 'u').
Command (m for help): m
Command action
a   toggle a bootable flag
b   edit bsd disklabel
c   toggle the dos compatibility flag
d   delete a partition
l   list known partition types
m   print this menu
n   add a new partition
o   create a new empty DOS partition table
p   print the partition table
q   quit without saving changes
s   create a new empty Sun disklabel
t   change a partition's system id
u   change display/entry units
v   verify the partition table
w   write table to disk and exit
x   extra functionality (experts only)

通过键入m，帮助可以知道，d是用来删除分区的。进行如下的操作：

Command (m for help): d
Partition number (1-7): 6

依次类推，直到删除所有的分区，之后输入w，将修改写入U盘

Command (m for help): w

最后，创建新分区并格式化，使用下面的命令：
mkfs.vfat /dev/sda -I