overkill disk setup 2019

                                   btrfs: /home                /   swap: swap
                                          |                    |         |
                                  lvm lv: lv-home              lv-disk   lv-swap
                                          |                    |         |
                                          |                    +---------+
                                          |                    |
                                  lvm vg: vg1                  vg0
                                          |                    |
                                  lvm pv: pv1                  pv0
                                          |                    |
                                    luks: crypt1               crypt0
                                          |                    |
      bcache: cache--------------backing: bcache0              |
              |                           |                    |
 mdadm raid1: mirror-vol0    mdadm raid5: raid5-vol0    raid1: mirror-vol1
              |                           |                    |
           +--+--+                  +-----+-----+              +----------------+
           |     |                  |     |     |              |                |
           |     |                  |     |     |              |     bios_grub  |     bios_grub
           |     |                  |     |     |              |     |          |     |
gpt label: sdf1  sdg1               sda1  sdb1  sdc1           sdd2  sdd1       sde2  sde1
           |     |                  |     |     |              |     |          |     |
           |     |                  |     |     |              +-----+          +-----+
           |     |                  |     |     |              |                |
      ssd: sdf   sdg           hdd: sda   sdb   sdc       ssd: sdd              sde