root@debian:/home/liyezhen/src/sbk_debian_32bit/build/product_tools# fdisk -l /dev/sdb
GPT PMBR size mismatch (60062499 != 60995327) will be corrected by w(rite).
The backup GPT table is corrupt, but the primary appears OK, so that will be used.

Disk /dev/sdb: 29.1 GiB, 31229607936 bytes, 60995328 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: BE4B4A96-2EDA-4A01-886E-97A3523426A3

Device       Start      End Sectors  Size Type
/dev/sdb1     2048   104447  102400   50M EFI System
/dev/sdb2   104448   299007  194560   95M Linux filesystem
/dev/sdb3   299008  2252799 1953792  954M Linux filesystem
/dev/sdb4  2252800 10854399 8601600  4.1G Linux filesystem

root@debian:/home/liyezhen/src/sbk_debian_32bit/build/product_tools# parted -l 
Model: ATA ST3500413AS (scsi)
Disk /dev/sda: 500GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags: 

Number  Start   End    Size    Type      File system     Flags
 1      1049kB  496GB  496GB   primary   ext4            boot
 2      496GB   500GB  4218MB  extended
 5      496GB   500GB  4218MB  logical   linux-swap(v1)


Error: The backup GPT table is corrupt, but the primary appears OK, so that will
be used.
OK/Cancel? ok                                                             
Warning: Not all of the space available to /dev/sdb appears to be used, you can fix the GPT to use all of the space (an extra 932828 blocks) or continue with the current setting? 
Fix/Ignore? fix                                                           
Model: Kingston DataTraveler 3.0 (scsi)
Disk /dev/sdb: 31.2GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags: 

Number  Start   End     Size    File system  Name              Flags
 1      1049kB  53.5MB  52.4MB  fat16        Linux filesystem  boot, esp
 2      53.5MB  153MB   99.6MB  ext4
 3      153MB   1153MB  1000MB  ext4
 4      1153MB  5557MB  4404MB  ext4


Error: The backup GPT table is corrupt, but the primary appears OK, so that will be used.
OK/Cancel? ok                                                             
Model: SanDisk Ultra USB 3.0 (scsi)
Disk /dev/sdc: 30.8GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags: 

Number  Start   End     Size    File system  Name              Flags
 1      1049kB  53.5MB  52.4MB  fat16        Linux filesystem  boot, esp
 2      53.5MB  153MB   99.6MB  ext4
 3      153MB   1153MB  1000MB  ext4
 4      1153MB  5557MB  4404MB  ext4


root@debian:/home/liyezhen/src/sbk_debian_32bit/build/product_tools# 
root@debian:/home/liyezhen/src/sbk_debian_32bit/build/product_tools# 
root@debian:/home/liyezhen/src/sbk_debian_32bit/build/product_tools# 
root@debian:/home/liyezhen/src/sbk_debian_32bit/build/product_tools# fdisk -l /dev/sdb

Disk /dev/sdb: 29.1 GiB, 31229607936 bytes, 60995328 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: BE4B4A96-2EDA-4A01-886E-97A3523426A3

Device       Start      End Sectors  Size Type
/dev/sdb1     2048   104447  102400   50M EFI System
/dev/sdb2   104448   299007  194560   95M Linux filesystem
/dev/sdb3   299008  2252799 1953792  954M Linux filesystem
/dev/sdb4  2252800 10854399 8601600  4.1G Linux filesystem

root@debian:/home/liyezhen/src/sbk_debian_32bit/build/product_tools# mount /dev/sdb4 /mnt/usb
mount: wrong fs type, bad option, bad superblock on /dev/sdb4,
       missing codepage or helper program, or other error

       In some cases useful info is found in syslog - try
       dmesg | tail or so.
root@debian:/home/liyezhen/src/sbk_debian_32bit/build/product_tools# 
root@debian:/home/liyezhen/src/sbk_debian_32bit/build/product_tools# 
root@debian:/home/liyezhen/src/sbk_debian_32bit/build/product_tools# fsck.ext4 /dev/sdb4 
e2fsck 1.42.12 (29-Aug-2014)
Superblock has an invalid journal (inode 8).
Clear<y>? yes
*** ext3 journal has been deleted - filesystem is now ext2 only ***

说明：GPT PMBR size mismatch 解决方法

1. parted -l 修复分区表