studen@rubens:~$ sudo fdisk /dev/sda

Welcome to fdisk (util-linux 2.33.1).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.

The size of this disk is 3.7 TiB (4000787030016 bytes). DOS partition table format cannot be u                                                                               sed on drives for volumes larger than 2199023255040 bytes for 512-byte sectors. Use GUID parti                                                                               tion table format (GPT).

Command (m for help): m

Help:

  DOS (MBR)
   a   toggle a bootable flag
   b   edit nested BSD disklabel
   c   toggle the dos compatibility flag

  Generic
   d   delete a partition
   F   list free unpartitioned space
   l   list known partition types
   n   add a new partition
   p   print the partition table
   t   change a partition type
   v   verify the partition table
   i   print information about a partition

  Misc
   m   print this menu
   u   change display/entry units
   x   extra functionality (experts only)

  Script
   I   load disk layout from sfdisk script file
   O   dump disk layout to sfdisk script file

  Save & Exit
   w   write table to disk and exit
   q   quit without saving changes

  Create a new label
   g   create a new empty GPT partition table
   G   create a new empty SGI (IRIX) partition table
   o   create a new empty DOS partition table
   s   create a new empty Sun partition table


Command (m for help): p

Disk /dev/sda: 3.7 TiB, 4000787030016 bytes, 7814037168 sectors
Disk model: ST4000VN006-3CW1
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Disk identifier: 0xfe5d4103

Device     Boot Start        End    Sectors Size Id Type
/dev/sda1        2048 4294967294 4294965247   2T 83 Linux

Command (m for help): d
Selected partition 1
Partition 1 has been deleted.

Command (m for help): p
Disk /dev/sda: 3.7 TiB, 4000787030016 bytes, 7814037168 sectors
Disk model: ST4000VN006-3CW1
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Disk identifier: 0xfe5d4103

Command (m for help): g
Created a new GPT disklabel (GUID: EE02513B-3BCE-704C-AA8E-F32E63FDC0E6).
The old dos signature will be removed by a write command.

Command (m for help): p

Disk /dev/sda: 3.7 TiB, 4000787030016 bytes, 7814037168 sectors
Disk model: ST4000VN006-3CW1
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: EE02513B-3BCE-704C-AA8E-F32E63FDC0E6

Command (m for help): n
Partition number (1-128, default 1):
First sector (2048-7814037134, default 2048):
Last sector, +/-sectors or +/-size{K,M,G,T,P} (2048-7814037134, default 7814037134):

Created a new partition 1 of type 'Linux filesystem' and of size 3.7 TiB.
Partition #1 contains a xfs signature.

Do you want to remove the signature? [Y]es/[N]o: N

Command (m for help): p

Disk /dev/sda: 3.7 TiB, 4000787030016 bytes, 7814037168 sectors
Disk model: ST4000VN006-3CW1
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: EE02513B-3BCE-704C-AA8E-F32E63FDC0E6

Device     Start        End    Sectors  Size Type
/dev/sda1   2048 7814037134 7814035087  3.7T Linux filesystem

Command (m for help): w
The partition table has been altered.
Calling ioctl() to re-read partition table.
Syncing disks.