What is physical volume in LVM?
A physical volume is any physical storage device, such as a Hard Disk Drive ( HDD ), Solid State Drive ( SSD ), or partition, that has been initialized as a physical volume with LVM. Without properly initialized physical volumes, you cannot create Volume Groups or logical volumes. So let’s get started!
How do you extend a logical volume?
In short, here are the steps to extend the size of your logical volume:
- Create new partition on harddisk.
- Add the partition you just created as a physical volume.
- Add the new physical volume to the volume group.
- Assign space from the volume group to the logical volume.
- Resize the filesystem.
How do you create a physical volume?
To create Physical volume in the Linux system, you need to use pvcreate command. You can go through the below-given example. In this example, I have one Hard Disk named /dev/sdb. I created one Physical volume from this hard disk.
How do I increase physical volume size in Linux?
Extend LVM manually
- Extend the physical drive partition: sudo fdisk /dev/vda – Enter the fdisk tool to modify /dev/vda.
- Modify (extend) the LVM: Tell LVM the physical partition size has changed: sudo pvresize /dev/vda1.
- Resize the file system: sudo resize2fs /dev/COMPbase-vg/root.
What commands are needed to increase the size of a logical volume located on physical volumes that are completely allocated?
You can use -l argument of the lvcreate command to create a logical volume that uses the entire volume group. Another way to create a logical volume that uses the entire volume group is to use the vgdisplay command to find the “Total PE” size and to use those results as input to the lvcreate command.
What tool should you use to replace a physical volume in LVM?
If a device is no longer needed by LVM, you can use the ‘vgreduce’ command to remove that physical volume from it’s volume group. The ‘vgreduce’ command shrinks the capacity of a volume group by removing a physical volume.
How do I expand an existing disk in Linux?
Steps
- Shut down the VM from Hypervisor.
- Expand the disk capacity from settings with your desired value.
- Start the VM from the hypervisor.
- Login to virtual machine console as root.
- Execute below command to check the disk space.
- Now execute this below command to initialize the expanded space and mount it.
