stuart@office:~$ sudo fdisk -l /dev/sdb
Disk /dev/sdb: 931.5 GiB, 1000204886016 bytes, 1953525168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 512242D7-F3BB-4EA1-914B-CEDA513DAB26

Device         Start        End    Sectors   Size Type
/dev/sdb1         34       2047       2014  1007K BIOS boot
/dev/sdb2       2048  419430400  419428353   200G Linux filesystem
/dev/sdb3  419432448 1953523711 1534091264 731.5G Linux filesystem
stuart@office:~$ sudo gdisk -l /dev/sdb
GPT fdisk (gdisk) version 1.0.1

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

Found valid GPT with protective MBR; using GPT.
Disk /dev/sdb: 1953525168 sectors, 931.5 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): 512242D7-F3BB-4EA1-914B-CEDA513DAB26
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 1953525134
Partitions will be aligned on 8-sector boundaries
Total free space is 3470 sectors (1.7 MiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1              34            2047   1007.0 KiB  EF02  BIOS boot partition
   2            2048       419430400   200.0 GiB   8300  Linux filesystem
   3       419432448      1953523711   731.5 GiB   8300  primary