doesn‘t contain a valid partition table

• 查看硬盘空间

$ fdisk -l
Disk /dev/mmcblk0: 29 GB, 31037849600 bytes, 60620800 sectors
947200 cylinders, 4 heads, 16 sectors/track
Units: sectors of 1 * 512 = 512 bytesDisk /dev/mmcblk0 doesn't contain a valid partition table
Disk /dev/mmcblk0p1: 1 MB, 1048576 bytes, 2048 sectors
32 cylinders, 4 heads, 16 sectors/track
Units: sectors of 1 * 512 = 512 bytesDisk /dev/mmcblk0p1 doesn't contain a valid partition table

• 解决办法

$ fdisk /dev/mmcblk0

m：菜单

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
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)Command (m for help): n
Partition typep   primary partition (1-4)e   extended
p
Partition number (1-4): q
Partition number (1-4): 1
First sector (16-60620799, default 16):
Using default value 16
Last sector or +size{,K,M,G,T} (16-60620799, default 60620799):
Using default value 60620799Command (m for help): w
The partition table has been altered.
Calling ioctl() to re-read partition table
fdisk: WARNING: rereading partition table failed, kernel still uses old table: Device or resource busy