Heroin is small. Commander in the US South Commander John Kerry said in 2015 "We are thinking that this is a relatively small amount, 40 to 50 tons, heroin caused a heroin outbreak in America." It was. It may increase today, but it still takes up a little space: all heroin consumed in the US may be loaded in two 40 - foot containers. Imagine that the contents of these containers will be broken down into small quantities, scattered throughout the vehicle, baggage, and cargo and sent through 48 land intersections and the airport within 365 days. The reason why DEA reported that the US authorities succeeded in extracting 6.8 ton heroin in 2015 is difficult and may be equivalent to one quarter of Kelly's estimated demand.
Like pvcreate, this command is obvious. The first part after the vgcreate command is the name you gave to the volume group. In this case, we used "volume 1". Next, list the physical volumes you want to join. Once you have created a volume group, you can add logical volumes to it. One thing to keep in mind when creating logical volumes is that unlike regular partitions, you can resize immediately without unmounting the volumes. This means that you do not need to pre-plan the size of the various volumes on the system when creating the system. This is because there is a possibility that it will grow in the future.