Create a Concateneted Volume

Initialize the disk or partition for use by the Logical Volume Manager LVM

pvcreate /dev/sdb1 /dev/sdb2 /dev/sdb3 /dev/sdb4
pvs
pvdisplay

Create a volume group

vgcreate myvg /dev/sdb1 /dev/sdb2
vgdisplay

Create a logical volume in an existing volume group

lvcreate --size 1g myvg (creates /dev/myvg/lv01
lvs
lvdisplay

Build the file system ext4 on our new logical volume /dev/myvg/lv01

mkfs -t ext4 /dev/myvg/lv01