encrypt with LUKS
mkdir -pv /etc/crypttab.keys/
dd if=/dev/urandom of=/etc/crypttab.keys/WDC-WD60EFZX-68B.a bs=4096 count=1
dd if=/dev/urandom of=/etc/crypttab.keys/WDC-WD60EFZX-68B.b bs=4096 count=1
cryptsetup luksFormat /dev/sdb --key-file /etc/crypttab.keys/WDC-WD60EFZX-68B.a
cryptsetup luksFormat /dev/sdd --key-file /etc/crypttab.keys/WDC-WD60EFZX-68B.b
cryptsetup luksOpen /dev/disk/by-uuid/1e65da55-ff2b-4194-9443-76a45d4dd563 WD60EFZX-68B.a -d /etc/crypttab.keys/WDC-WD60EFZX-68B.a
cryptsetup luksOpen /dev/disk/by-uuid/d99b30ef-ddfd-41aa-a6ab-bbad87ef7240 WD60EFZX-68B.b -d /etc/crypttab.keys/WDC-WD60EFZX-68B.b
cryptsetup status /dev/mapper/WD60EFZX-68B.a
cryptsetup status /dev/mapper/WD60EFZX-68B.b
setup btrfs
mkfs.btrfs -L DATA -m raid0 -d raid0 /dev/mapper/WD60EFZX-68B.a
mkfs.btrfs -L DATA -m raid0 -d raid0 /dev/mapper/WD60EFZX-68B.b
btrfs device add -f /dev/mapper/WD60EFZX-68B.a /data
btrfs balance start -v -dconvert=raid0 -mconvert=raid1 /data
btrfs balance status /data
automount btrfs
vim /etc/crypttab
WD60EFZX-68B.a UUID=1e65da55-ff2b-4194-9443-76a45d4dd563 /etc/crypttab.keys/WDC-WD60EFZX-68B.a luks
WD60EFZX-68B.b UUID=d99b30ef-ddfd-41aa-a6ab-bbad87ef7240 /etc/crypttab.keys/WDC-WD60EFZX-68B.b luks
vim /etc/fstab
UUID=cd5ce729-f648-4c17-a5bb-859112091a92 /data btrfs defaults 0 0
check btrfs
btrfs fi usage /data
btrfs filesystem show /data
btrfs device usage /data
btrfs device stats /dev/mapper/WD60EFZX-68B.a
btrfs device stats /dev/mapper/WD60EFZX-68B.b