/# gdisk -l /dev/sdb
GPT fdisk (gdisk) version 0.8.10

Caution: invalid main GPT header, but valid backup; regenerating main header
from backup!

Caution! After loading partitions, the CRC doesn't check out!
Warning! Main and backup partition tables differ! Use the 'c' and 'e' options
on the recovery & transformation menu to examine the two tables.

Warning! One or more CRCs don't match. You should repair the disk!

Partition table scan:
  MBR: protective
  BSD: not present
  APM: not present
  GPT: damaged

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Caution: Found protective or hybrid MBR and corrupt GPT. Using GPT, but disk
verification and recovery are STRONGLY recommended.
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Warning! Main partition table overlaps the first partition by 34 blocks!
You will need to delete this partition or resize it in another utility.

Warning! Secondary partition table overlaps the last partition by
18446744072732778483 blocks!
You will need to delete this partition or resize it in another utility.
Disk /dev/sdb: 976773166 sectors, 465.8 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): 03753E98-C484-495A-B64C-503AED45DF69
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 976773132
Partitions will be aligned on 8-sector boundaries
Total free space is 16777182 sectors (8.0 GiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1        16777216  216172782113783808   96.0 EiB    FFFF  턁
   5  18446744071562067968  18446744073709551615   1024.0 GiB  FFFF