Before you can use a disk or disk partition as a physical volume
you will have to initialize it:
For entire disks:
Run pvcreate on the disk:
# pvcreate /dev/hdb
This creates a volume group descriptor at the start of
If you get an error that LVM can't initialize a
disk with a partition table on it, first make sure
that the disk you are operating on is the correct
one. If you are very sure that it is, run the
The following commands will destroy the
partition table on the disk being operated on.
Be very sure it is the correct disk.