使用fdisk -l |grep Disk命令檢視磁碟情況提示Disk /dev/sdb doesn't contain a valid partition table，解決方案如下：

使用，命令fdisk /dev/sdb，然後按照下面的步驟操作即可

Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel with disk identifier 0xc26af663.
Changes will remain in memory only, until you decide to write
 
 them.
After that, of course, the previous content won't be recoverable.

Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)

The device presents a logical sector size that is smaller thanthe physical sector size.
 Aligning to a physical sector (or optimalI/O) size boundary is recommended, or performance may be impacted.
 


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)
Command (m for help):n

Command action
   e   extended
   p   primary partition (1-4)
p
Partition number (1-4): 1

First sector (2048-3515219967, default 2048):（直接回車）

Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-3515219967, default 3515219967):（直接回車）
Using default value 3515219967
Command (m for help): p
Disk /dev/sdb: 1799.8 GB, 1799792623616 bytes
255 heads, 63 sectors/track, 218812 cylinders, total 3515219968 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 262144 bytes / 262144 bytes
Disk identifier: 0xc26af663
 Device Boot Start End Blocks Id System
/dev/sdb1 2048 3515219967 1757608960 83 Linux
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.

現在再fdisk -l，結果正常