Create LVM - CentOS

Below are the steps to create LVM. LVM stands for Logical Volume Manager.

With LVM, we can create logical partitions that can span across one or more physical hard drives. First, the hard drives are divided into physical volumes, then those physical volumes are combined together to create the volume group and finally the logical volumes are created from volume group.

Add the new disk in your Virtual Machine and Scan the system using the below command

echo "- - -" > /sys/class/scsi_host/host0/scan

echo "- - -" > /sys/class/scsi_host/host1/scan

echo "- - -" > /sys/class/scsi_host/host2/scan

echo "- - -" > /sys/class/scsi_host/host3/scan

pvcreate /dev/sdb

vgcreate -s 32M vg_data /dev/sdb

lvcreate -l 100%FREE -n lv_data vg_data

mkfs.ext4 /dev/vg_data/lv_data

mkdir /data

echo -e "/dev/vg_data/lv_data\t/data\text4\tdefaults\t1 2" >> /etc/fstab

mount /data 

or 

mount -a