How to create and manage LVM on OpenSUSE leap 42.3
To create and manage LVM on OpenSUSE Leap 42.3
LVM is a widely-used technique and extremely flexible disk management scheme for deploying logical rather than physical storage. With LVM, system administrator can easily resize and extend the logical drive when it is required. In this tutorial, you will learn the method to create and manage LVM on OpenSUSE Leap 42.3
Creating and Managing LVM
First, add new hardisk of any size and to view it use the following command.
linuxhelp:~ # fdisk -l
Disk /dev/sda: 20 GiB, 21474836480 bytes, 41943040 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x0003044e
Device Boot Start End Sectors Size Id Type
/dev/sda1 2048 4177919 4175872 2G 82 Linux swap / Solaris
/dev/sda2 * 4177920 4997119 819200 400M 83 Linux
/dev/sda3 4997120 41943039 36945920 17.6G 83 Linux
Disk /dev/sdb: 5 GiB, 5368709120 bytes, 10485760 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Next, you need to create a new Partiton using fdisk tool and select partition type as LVM. Refer the following command.
linuxhelp:~ # fdisk /dev/sdb
Welcome to fdisk (util-linux 2.30.2).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Device does not contain a recognized partition table.
Created a new DOS disklabel with disk identifier 0xf6c29730.
Command (m for help): n
Partition type
p primary (0 primary, 0 extended, 4 free)
e extended (container for logical partitions)
Select (default p): p
Partition number (1-4, default 1): 1
First sector (2048-6291455, default 2048):
Last sector, +sectors or +size{K,M,G,T,P} (2048-6291455, default 6291455): +1G
Created a new partition 1 of type ' Linux' and of size 1 GiB.
Command (m for help): p
Disk /dev/sdb: 3 GiB, 3221225472 bytes, 6291456 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0xf6c29730
Device Boot Start End Sectors Size Id Type
/dev/sdb1 2048 2099199 2097152 1G 83 Linux
Command (m for help): t
Selected partition 1
Hex code (type L to list all codes): 8e
Changed type of partition ' Linux' to ' Linux LVM' .
Command (m for help): p
Disk /dev/sdb: 3 GiB, 3221225472 bytes, 6291456 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0xf6c29730
Device Boot Start End Sectors Size Id Type
/dev/sdb1 2048 2099199 2097152 1G 8e Linux LVM
Command (m for help): w
The partition table has been altered.
Calling ioctl() to re-read partition table.
And then, you need to initialize the partition /dev/sdb1 as an LVM physical volume by making use of the following command.
linuxhelp:~ # pvcreate /dev/sdb1 Physical volume " /dev/sdb1" successfully created. linuxhelp:~ # pvs PV VG Fmt Attr PSize PFree /dev/sdb1 lvm2 --- 1.00g 1.00g
After that you need to run pvdisplay and pvscan commands in the following manner to display the properties of LVM.
linuxhelp:~ # pvdisplay " /dev/sdb1" is a new physical volume of " 1.00 GiB" --- NEW Physical volume --- PV Name /dev/sdb1 VG Name PV Size 1.00 GiB Allocatable NO PE Size 0 Total PE 0 Free PE 0 Allocated PE 0 PV UUID CWNuoW-xfe6-A3DY-27oo-fXtL-nV9I-4VlWpx linuxhelp:~ # pvscan PV /dev/sdb1 lvm2 [1.00 GiB] Total: 1 [1.00 GiB] / in use: 0 [0 ] / in no VG: 1 [1.00 GiB]
After that, you need to create volume group name vg1 and add /dev/sdb1 partition into the group with the help of the following command.
linuxhelp:~ # vgcreate vg1 /dev/sdb1
Volume group " vg1" successfully created
After that, you need to create a logical volume as follows.
linuxhelp:~ # lvcreate -n lv1 -l 100%FREE vg1
Logical volume " lv1" created.
And display the created logical volumes by running the following command.
linuxhelp:~ # lvdisplay
--- Logical volume ---
LV Path /dev/vg1/lv1
LV Name lv1
VG Name vg1
LV UUID 3aT3Iz-Ap3n-e22r-XaKT-eU4B-t3kB-BjsEt3
LV Write Access read/write
LV Creation host, time linuxhelp, 2017-12-05 16:49:25 +0530
LV Status available
# open 0
LV Size 1020.00 MiB
Current LE 255
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 254:0
Later, make use of the mkfs command to format the newly created LVM as follows .
linuxhelp:~ # mkfs.ext4 /dev/vg1/lv1
mke2fs 1.43.7 (16-Oct-2017)
Creating filesystem with 261120 4k blocks and 65280 inodes
Filesystem UUID: d348b933-25b9-4dc0-aed3-9c15095fc05a
Superblock backups stored on blocks:
32768, 98304, 163840, 229376
Allocating group tables: done
Writing inode tables: done
Creating journal (4096 blocks): done
Writing superblocks and filesystem accounting information: done
And then, create the mount point and mount the new LVM as follows.
linuxhelp:~ # mkdir -p /data
linuxhelp:~ # mount /dev/vg1/lv1 /data/
Finally, verify the new disk layout with the help of the following command.
linuxhelp:~ # df -h
Filesystem Size Used Avail Use% Mounted on
udev 441M 0 441M 0% /dev
tmpfs 92M 6.6M 85M 8% /run
/dev/sda3 16G 12G 3.4G 78% /
tmpfs 456M 0 456M 0% /dev/shm
tmpfs 5.0M 4.0K 5.0M 1% /run/lock
tmpfs 456M 0 456M 0% /sys/fs/cgroup
/dev/sda1 453M 48M 378M 12% /boot
tmpfs 92M 16K 92M 1% /run/user/1000
/dev/mapper/vg1-lv1 988M 2.6M 919M 1% /data
With this, this tutorial on creating and managing LVM on OpenSUSE leap 42.3 comes to an end.
for deploying logical rather than physical storage. With LVM, system administrator can
easily resize and extend
with the kernel and do all their device mapping (hence the name device-mapper).
As long as you have device-mapper,
# lvdisplay