Encryption
Make or choose your partition (read related guides)
Encrypt the partition with a good passphrase
cryptsetup --verbose --verify-passphrase luksFormat /dev/sda1
Open the encrypted device:
cryptsetup luksOpen /dev/sda1 vol_1 #vol_1 can be any name
Create a filesystem:
mkfs.xfs -imaxpct=3 /dev/mapper/vol_1 #Any filesystem is good even LVM!!
Mount:
mkdir /AES_Drive && mount /dev/mapper/vol_1 /AES_Drive
Umount:
umount /AES_Drive && cryptsetup luksClose /dev/mapper/vol_1
RAID --> LUKS --> LVM --> ext4 #Single Password
RAID --> LVM --> LUKS --> ext4 #Password per LVM