encrypted partition in linux

Put hese into rc.local file for loading crypto modules.
modprobe cryptoloop
modprobe aes

if you need many loop device add below to modprobe.conf file.
options loop max_loop=32

Prepare encrypted file about 40Gb
dd if=/dev/zero of=/mnt/disk3part4/xfile01 bs=100M count=400
losetup -e aes /dev/loop1 /mnt/disk3part4/xfile01
mkfs -t ext2 /dev/loop1

Mounting encrypted file
losetup -e aes /dev/loop11 /mnt/disk3part4/xfile01
mount -o loop /dev/loop11 /home/username/torrent01