What Is a Volume Group?

Volume management, computer storage terminology. ^[1] Volume management, PV physical volume: ordinary direct-access storage devices, which are fixed and removable, and are typically hard disks. vg volume group: The largest storage unit in AIX. A volume group consists of a set of physical hard disks, that is, one or more physical volumes. pp Physical partition: Divides physical volumes into consecutive equal-sized storage units. The physical partitions in a volume group are all the same size. lp logical partition: suitable for mapping logical units of physical partitions, one logical partition can correspond to one or multiple physical partitions. lv logical volume: refers to a collection of multiple logical partitions in a volume group. The logical partitions in a logical volume are continuous, but the corresponding physical partitions are discontinuous, which can be on one disk or on different disks. on.