LVM

to create a Physical Volume:

pvcreate /dev/sdb /dev/sdc /dev/sdd /dev/sde /dev/sdf /dev/sdg

show current Physical Volumes:

pvdisplay

to create Volume Groups:

vgcreate media /dev/sdb /dev/sdc /dev/sdd /dev/sde /dev/sdf /dev/sdg

shows currents Volume Groups:

vgdisplay

to create Logical Volumes:

lvcreate -n lv_media -L 76.40TiB

to shows all Logical Volumes:

lvdisplay

format Logical Volume:

mkfs.ext4 /dev/media/lv_media

inforamtion about all device mapper

dmsetup info