sudo dd if=gpt/tests/fixtures/gpt-linux-disk-01.img bs=512 count=1 skip=1 > lba.1
Primary Header of gpt-linux-disk-01.img
------------------------------------------
Signature:              0x4546492050415254
Revision:                       0x00000100
HeaderSize:                             92
HeaderCRC32:                    0x3e9607da
HeaderCRC32 (calculated):       0x3e9607da
Reserved:                       0x00000000
MyLBA:                                   1
AlternateLBA:                           95
FirstUsableLBA:                         34
LastUsableLBA:                          62
PartitionEntryLBA:                       2
NumberOfPartitionEntries:              128
SizeOfPartitionEntry:                  128
PartitionEntryArrayCRC32:        0x90e9ba6

==========================================
sudo dd if=gpt/tests/fixtures/gpt-linux-disk-01.img bs=512 count=1 skip=95 > lba.last
Backup Header
------------------------------------------
Signature:              0x4546492050415254
Revision:                       0x00000100
HeaderSize:                             92
HeaderCRC32:                    0xeacc533e
HeaderCRC32 (calculated):       0xeacc533e
Reserved:                       0x00000000
MyLBA:                                  95
AlternateLBA:                            1
FirstUsableLBA:                         34
LastUsableLBA:                          62
PartitionEntryLBA:                      63
NumberOfPartitionEntries:              128
SizeOfPartitionEntry:                  128
PartitionEntryArrayCRC32:        0x90e9ba6