invalid main GPT header

gistfile1.txt

Last login: Fri Jul  6 09:25:53 on ttys004

jlee:~ jlee$ /usr/local/sbin/gdisk /dev/disk1
GPT fdisk (gdisk) version 0.8.2

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 partition table CRC mismatch! Loaded backup partition table
instead of main partition table!

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

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

Found valid MBR and corrupt GPT. Which do you want to use? (Using the
GPT MAY permit recovery of GPT data.)
 1 - MBR
 2 - GPT
 3 - Create blank GPT

Your answer: 2

Command (? for help): ?
b	back up GPT data to a file
c	change a partition's name
d	delete a partition
i	show detailed information on a partition
l	list known partition types
n	add a new partition
o	create a new empty GUID partition table (GPT)
p	print the partition table
q	quit without saving changes
r	recovery and transformation options (experts only)
s	sort partitions
t	change a partition's type code
v	verify disk
w	write table to disk and exit
x	extra functionality (experts only)
?	print this menu

Command (? for help): i
Partition number (1-3): 1
Partition GUID code: C12A7328-F81F-11D2-BA4B-00A0C93EC93B (EFI System)
Partition unique GUID: 000006C7-1C4C-0000-FF37-0000820B0000
First sector: 40 (at 20.0 KiB)
Last sector: 409639 (at 200.0 MiB)
Partition size: 409600 sectors (200.0 MiB)
Attribute flags: 0000000000000000
Partition name: 'EFI system partition'

Command (? for help): i
Partition number (1-3): 2
Partition GUID code: 48465300-0000-11AA-AA11-00306543ECAC (Apple HFS/HFS+)
Partition unique GUID: 5CCB59FC-3174-4C6F-BF9F-AB74051D1EC9
First sector: 409640 (at 200.0 MiB)
Last sector: 312885287 (at 149.2 GiB)
Partition size: 312475648 sectors (149.0 GiB)
Attribute flags: 0000000000000000
Partition name: 'Customer'

Command (? for help): i
Partition number (1-3): 3
Partition GUID code: EBD0A0A2-B9E5-4433-87C0-68B6B72699C7 (Microsoft basic data)
Partition unique GUID: D0BD4BE0-2A3B-4F51-9454-798988CA89E1
First sector: 313147432 (at 149.3 GiB)
Last sector: 625142407 (at 298.1 GiB)
Partition size: 311994976 sectors (148.8 GiB)
Attribute flags: 0000000000000000
Partition name: 'Untitled 2'

Command (? for help): w

Final checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTING
PARTITIONS!!

Do you want to proceed? (Y/N): y
OK; writing new GUID partition table (GPT).
Warning: The kernel may continue to use old or deleted partitions.
You should reboot or remove the drive.
The operation has completed successfully.
jlee:~ jlee$ /usr/local/sbin/gdisk /dev/disk1
GPT fdisk (gdisk) version 0.8.2

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

Found valid GPT with protective MBR; using GPT.

Command (? for help): r

Recovery/transformation command (? for help): q
jlee:~ jlee$ /usr/local/sbin/gdisk /dev/disk1
GPT fdisk (gdisk) version 0.8.2

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

Found valid GPT with protective MBR; using GPT.

Command (? for help): v

No problems found. 262157 free sectors (128.0 MiB) available in 3
segments, the largest of which is 262144 (128.0 MiB) in size.

Command (? for help):