What is logical volume in storage?
Logical volumes are groups of information located on physical volumes. A hierarchy of structures is used to manage disk storage. Every physical volume in use belongs to a volume group (VG). All of the physical volumes in a volume group are divided into physical partitions (PPs) of the same size.
What is the use of logical volume?
Logical volumes are groups of information located on physical volumes. A hierarchy of structures is used to manage disk storage. Each individual disk drive, called a physical volume (PV) has a name, such as /dev/hdisk0. Every physical volume in use belongs to a volume group (VG).
When to use logical volumes in Disk Management?
If a disk starts to fail, replacement disk can be registered as a physical volume with the volume group and the logical volumes extents can be migrated to the new disk without data loss. In a modern world every Server needs more space day by day for that we need to expand depending on our needs. Logical volumes can be use in RAID, SAN.
How do you resize a logical volume in LVM?
Attach the new storage to the system. Next, create a new Physical Volume (PV) from that storage. Add the PV to the Volume Group (VG) and then extend the Logical Volume (LV). Look at the picture below. The red line mark shows the original size of the root mount point. The xvdc disk is the new disk attached to it.
How to extend a logical volume in Linux?
This article looks at how to extend storage in Linux using Logical Volume Manager (LVM). The process is straightforward. Attach the new storage to the system. Next, create a new Physical Volume (PV) from that storage. Add the PV to the Volume Group (VG) and then extend the Logical Volume (LV). Look at the picture below.
Can a file system be added to a physical volume?
If a file system needs more space, it can be added to its logical volumes from the free spaces in its volume group and the file system can be re-sized as we wish. If a disk starts to fail, replacement disk can be registered as a physical volume with the volume group and the logical volumes extents can be migrated to the new disk without data loss.