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* There used to be problems if you reduced the logical volume size smaller than its unused capacity, but using the -r option prevents this from occurring.
* We can do these type of LVM operations without having to reboot the machine!
* You will also learn to simulate adding new hard disks by creating a virtual hard drive, partition & format new drive, add physical volume to volume group('''pvcreate''', '''vgextend''') and extend the logical volume.