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What does volume group mean?
A volume group is a collection of 1 to 32 physical volumes of varying sizes and types. When a physical volume is assigned to a volume group, the physical blocks of storage media on it are organized into physical partitions of a size you specify when you create the volume group.
Should I use LVM Group?
LVM can be extremely helpful in dynamic environments, when disks and partitions are often moved or resized. While normal partitions can also be resized, LVM is a lot more flexible and provides extended functionality. As a mature system, LVM is also very stable and every Linux distribution supports it by default.
Why does Linux need LVM?
Uses. LVM is used for the following purposes: Creating single logical volumes of multiple physical volumes or entire hard disks (somewhat similar to RAID 0, but more similar to JBOD), allowing for dynamic volume resizing. Performing consistent backups by taking snapshots of the logical volumes.
What is physical volume group?
A volume group ( VG ) is the central unit of the Logical Volume Manager (LVM) architecture. Physical volumes are devices that are initialized using LVM, i.e., hard disk drives, solid-state drives, partitions, etc.
How does logical volume management ( LVM ) work?
LVM allows for very flexible disk space management. It provides features like the ability to add disk space to a logical volume and its filesystem while that filesystem is mounted and active and it allows for the collection of multiple physical hard drives and partitions into a single volume group which can then be divided into logical volumes.
How to create a volume group in Linux with LVM?
First, we will need to name the group. For test purposes, I will call our group LVMvgTEST. Now that we have decided on a name, let’s use a single command to add both physical volumes to the new volume group. This command needs to be run as root or with sudo. You can see in the output that the volume group was successfully created.
What’s the name of the logical volume group?
The Volume Group name is MyVG01 and the Logical Volume Name is Stuff. Creating the Logical Volume does not create the filesystem. That task must be performed separately. The command below creates an EXT4 filesystem that fits the newly created Logical Volume.
What is LVM and what are its benefits?
What is LVM (Logical Volume Management), and what are its Benefits? Logical Volume Management or LVM is a framework of the Linux operating system that has been introduced for the easier management of physical storage devices.