What is MANAGING LOGICAL VOLUME
There are Four steps needed to create a usable Logical Volume.
1.
Prepare the physical device.
2.
Create a physical volume.
3.
Create a volume group.
4.
Create a logical volume.
Create
Logical Volume of 400 MiB.
1.
Create the physical resource.
1.1 Use fdisk to create partition.
# fdisk /dev/vdb
1.2 Create the Primary
partition.
# n
# p
# 1
# Enter
# +500M
1.3. Change partition type to Linux LVM
8e.
# t
# 1
# 8e
1.4. Write changes to the partition table.
# w
1.5. Use partprobe to register new
partition.
# partprobe
2.
Create physical volumes.
# pvcreate /dev/vdb1
3.
Create Volume Group.
# vgcreate shazam /dev/vdb1
shazam is the name of
Volume Group
4.
Create the Logical Volume.
# lvcreate –n storage –L 400M
shazam
Storage is the name of Logical Volume, -L is
used to gives size of Logical Volume.
How to Create Logical Volume in Linux
5.
Add a Persistent File System.
5.1 Use mkfs to place file system on storage
LV.
# mkfs –t xfs /dev/shazam/storage
-t is used to
set file system type,xfs is file system type,/dev/shazam/storage is path of Logical Volume.
5.2 Use mkdir to create a mount point
at /storage.
# mkdir /storage
5.3 Configure /etc/fstab
# vim
/etc/fstab
/dev/shazam/storage /storage xfs defaults 0 0
5.4 Use mount to verify the /etc/fstab
entry and mount the new storage LV device.
# mount –a
6.
Verify the Logical Volume is successfully mounted at specified point.
# df –h /storage
