How to create LVM Partition in Linux
Physical volume (PV):- PV is the partitions on hard disk, or hard disk itself. PV are the base of LVM structure and referred as physical volumes.
Volume Group (VG):- VG are the combined physical volume into a single pool of storage. Think it is as a group of PV.
Logical volume (LV):- LV is the actual partitions on system created from VG.
Follow below steps to create file systems in Linux machines:
- fdisk -l command will list the current partitions.
- Use following command to create PV from hard disk.
#pvcreate [disk]
If you have more than one partition to be configured as PV, you can list them as well
#pvcreate [disk partition] [disk partition] [disk partition]
Run below command to check physical volumes
# pvs or pvdisplay
- To create new volume using fdisk
fdisk /dev/sdx [Replace /dev/sdx with your hard disk mount point]
n [command to create new partition in fdisk prompt]
press enter [ accept default first cylinder ]
+200M [ Size of LVM, specify it at as per your need and availability of space ]
t [command to set the partition type]
6 [Number or our created partition, make sure here you specify current number.]
8e [Code to set partition type LVM]
w [command to save the change ]
- To create Volume group
# vgcreate VGname pvname
Run below command to check Volume groups
# vgs or vgdisplay
- We can create logical volume by giving the name of a new logical volume, its size, and the volume group it will live on.
# lvcreate -L size(GB/MB/No. of Blocks)-n LVname VGname
- Create Directory to mount file system
# mkdir –p /NEWFS
- Mount new FS
# mount /dev/vgname/lvname /NEWFS
- To mount them permanently add new FS edit /etc/fstab file
# vi /etc/fstab
eg.
/dev/newvg/newlv mountname fstype defaults 0 0