Naplnit disk náhodnými daty:

~$ sudo dd if=/dev/urandom of=/dev/sda bs=4M status=progress

238468+0 záznamů přečteno
238467+0 záznamů zapsáno
1000204886016 bajtů (1,0 TB, 932 GiB) zkopírováno, 29102,6 s, 34,4 MB/s

Vytvořit partition (GPT):

~$ sudo gdisk -l /dev/sda

GPT fdisk (gdisk) version 1.0.3

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

Creating new GPT entries.

Command (? for help): n
Partition number (1-128, default 1): 
First sector (34-1953525134, default = 2048) or {+-}size{KMGTP}: 
Last sector (2048-1953525134, default = 1953525134) or {+-}size{KMGTP}: 
Current type is 'Linux filesystem'
Hex code or GUID (L to show codes, Enter = 8300): 
Changed type of partition to 'Linux filesystem'

Command (? for help): w

Final checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTING
PARTITIONS!!

Do you want to proceed? (Y/N): y
OK; writing new GUID partition table (GPT) to /dev/sda.
The operation has completed successfully.

Kontrola:

~$ lsblk

NAME                 MAJ:MIN RM   SIZE RO TYPE  MOUNTPOINT
sda                    8:0    0 931,5G  0 disk  
└─sda1                 8:1    0 931,5G  0 part  

~$ sudo gdisk -l /dev/sda

GPT fdisk (gdisk) version 1.0.3

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

Found valid GPT with protective MBR; using GPT.
Disk /dev/sda: 1953525168 sectors, 931.5 GiB
Model: HD650           
Sector size (logical/physical): 512/4096 bytes
Disk identifier (GUID): 684CCBB4-EEA4-4C92-BC2A-6D16D1B0ADF8
Partition table holds up to 128 entries
Main partition table begins at sector 2 and ends at sector 33
First usable sector is 34, last usable sector is 1953525134
Partitions will be aligned on 2048-sector boundaries
Total free space is 2014 sectors (1007.0 KiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1            2048      1953525134   931.5 GiB   8300  Linux filesystem

~$ sudo cryptsetup luksFormat /dev/sda1

WARNING!
========
Toto nevratně přepíše data na /dev/sda1.

Are you sure? (Type uppercase yes): YES
Zadejte heslo pro /dev/sda1: 
Ověřte heslo: 

~$ sudo cryptsetup -v luksOpen /dev/sda1 red

Zadejte heslo pro /dev/sda1: 
Pozice klíče 0 odemknuta.
Příkaz úspěšně vykonán.