What is a group of volumes?
Volume Group (VG) is a logical collection or a useful grouping of computer storage that can include multiple physical devices. It combines both physical and logical volumes into a single administrative element in Unix & Reg and Linux & Reg Logical Volume Management (LVM). Physical volume can be an internal or external storage device. Logical volumes are a clarity or connected lists of storage space that could connect with parts of several physical volumes. According to Linux & Reg, the Volume Group is the highest level of abstraction or visualization in its logical union of the administrator.
In early implementations, physical discs were made available to operating systems using static partitions. These partitions may be a sequential part or the entire physical device. Each section would seem to be a separate unit of the operating system. If the section needed more space, information would have to be transferred to a larger partition of the same or other physical units.
Many systems, especiallyThe UNIX & REG -based éna will now break space on physical disks into standard storage units. Logical bundles made up of units from multiple units can be assigned to partitions and storage units can be added or deleted as the requirements change. This is the basis of the logical volume management.
Physical volumes can be hard drives, disk partitions or external storage device. They are considered to be a clarified number of storage spaces called physical range (PE). These are the basic units of storage allocation and, depending on the system, they may have a uniform or variable size. Logical volumes are similarly formed by logical ranges (LE), which are of the same size as physical ranges. The task of a group of volumes is to map logical ranges to the physical extent and create a forest Fund to which you can connect with logical volumes or virtual sections.
Logical volumes can be enlarged as neededny or reduced simply by adding a forest or returning to the pool. The forest may not be sequential or even share the same device. The volume group can change the size with the addition or removal of the storage unit, even if it may require movement or assignment of the forest. However, physical and logical volumes are unique to their group of volumes and groups cannot bridge or be shared. As an administrative unit, a group of volumes itself can be moved to another host machine, which was carried out for authorization to access or completely hidden.