root@ubuntu:/home/ubuntu# gdisk -l /dev/sda
GPT fdisk (gdisk) version 0.8.2

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

Creating new GPT entries.
Disk /dev/sda: 625142448 sectors, 298.1 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): FEAD7724-7184-4341-8736-0AD7957DA0D8
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 625142414
Partitions will be aligned on 2048-sector boundaries
Total free space is 625142381 sectors (298.1 GiB)