Creating and Managing Logical Volumes in SUSE Linux Enterprise

Get the drive names:

lsblk

Your output should match the below (the disks you'll be partitioning are nvme0n1, nvme1n1, and nvme2n1):

NAME        MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
nvme2n1     259:0    0   2G  0 disk
nvme1n1     259:1    0   2G  0 disk
nvme0n1     259:2    0   2G  0 disk
nvme3n1     259:3    0  10G  0 disk
├─nvme3n1p1 259:4    0   2M  0 part
├─nvme3n1p2 259:5    0  20M  0 part /boot/efi
└─nvme3n1p3 259:6    0  10G  0 part /

Run fdisk against the first of the drives that has no partitions listed:

sudo fdisk /dev/nvme0n1

Enter n to create a new partition, 
Then p for primary
Then 1 for the partition number.
Hit Enter for first and last sector since we will use the whole drive
Enter p to see the partition. 

Change the partition type label to Linux LVM:

Enter t to set the label
Then L to get a list of possible types
Then 8e for Linux LVM
The p to review the changes
Then w to write the changes

Have the kernel rescan the partition table, and then list partitions to verify:

sudo partprobe
lsblk

Repeat this process for the other two disks.

When finished with all three disks, run lsblk again to confirm the partitions are correct:

NAME        MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
nvme2n1     259:0    0   2G  0 disk
└─nvme2n1p1 259:7    0   2G  0 part
nvme1n1     259:1    0   2G  0 disk
└─nvme1n1p1 259:11   0   2G  0 part
nvme0n1     259:2    0   2G  0 disk
└─nvme0n1p1 259:8    0   2G  0 part
nvme3n1     259:3    0  10G  0 disk
├─nvme3n1p1 259:4    0   2M  0 part
├─nvme3n1p2 259:5    0  20M  0 part /boot/efi
└─nvme3n1p3 259:6    0  10G  0 part /

Create a physical volume on the first drive:

sudo pvcreate /dev/nvme0n1p1

Verify the physical volume was created:

sudo pvdisplay

Create the volume group:

sudo vgcreate VolumeGroup0 /dev/nvme0n1p1

Verify it was created:

sudo vgdisplay

Extend the volume group to the second drive — this will create the necessary physical volume:

sudo vgextend VolumeGroup0 /dev/nvme1n1p1

Get the size, which should be 3.99 GiB:

sudo vgdisplay

Create the logical volume from the volume group:

sudo lvcreate -L+3.99GB -n "backups" VolumeGroup0

Create the filesystem on the volume:

sudo mkfs.xfs /dev/VolumeGroup0/backups

Create a mount point and mount the volume:

sudo mkdir /mnt/backups
sudo mount /dev/VolumeGroup0/backups /mnt/backups/

Create a data file in the mount location:

sudo touch /mnt/backups/data
ls -l /mnt/backups

Add in the third drive to the volume group — this will also create the physical volume:

sudo vgextend VolumeGroup0 /dev/nvme2n1p1

Grow the logical volume by adding the size of the third disk:

sudo lvextend -L+1.91GB /dev/VolumeGroup0/backups

Then grow the filesystem to use the added space:

sudo xfs_growfs /mnt/backups

Verify data is still there and that the drive is the correct size:

ls -l /mnt/backups
df -hT 

This should show 5.9G in the Size column for /dev/mapper/VolumeGroup0-backups.