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→Adding a Physical Volume
# Add the disk (if not already attached) -- for this example, let's assume the disk is <code>/dev/sdb</code>
# Create a partition with <code>fdisk</code> - let's assume the partition is <code>/dev/sdb1</code>
# Format Mark the partitionas usable by LVM: <code>pvcreate /dev/''sdb1''</code>
# Add the partition to your volume group: <code>vgextend vg_main /dev/''sdb1''</code>