ubuntu@ubuntu:~$ sudo gdisk -l /dev/sda 
GPT fdisk (gdisk) version 0.8.8

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

Found valid GPT with protective MBR; using GPT.
Disk /dev/sda: 1465149168 sectors, 698.6 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): CC6577AA-7573-4356-9881-9B464DF672CF
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 1465149134
Partitions will be aligned on 2048-sector boundaries
Total free space is 1465149101 sectors (698.6 GiB)

Number  Start (sector)    End (sector)  Size       Code  Name
ubuntu@ubuntu:~$