Add a new physical disk to the system. The system should detect it as /dev/sdb.

Create a physical volume (PV) from the new disk:

pvcreate /dev/sdb

Verify the PV was created:

pvs

Display detailed PV information:

pvdisplay

Extand the existing volume group (VG) by adding the new PV:

vgextend vg_template /dev/sdb

Check the VG details to confirm available free space:

vgdisplay

Extand the logical volume (LV) to use all available free space:

lvextend -l +100%FREE /dev/mapper/vg_template-lv_root

Determine the filesystem type before resizing:

df -Th

For ext4 filesystems, resize with:

resize2fs /dev/mapper/vg_template-lv_root

For XFS filesystems, use:

xfs_growfs /dev/mapper/vg_template-lv_root

Verify the extended storage capacity:

df -Th

Troubleshoooting Disk Filter Issues

If pvcreate fails with "Device excluded by a filter":

parted /dev/sda print

Reinitialize the disk label (WARNING: destroys all data):

parted /dev/sda
(parted) mklabel loop
(parted) print