...
Create a partition and format it. You may use parted and mkfs.ext4:
No Format sudo parted -s -a-script -- /dev/vdb mklabel gpt # this step only required for large disks, e.g. >2TB sudo parted --script --align optimal -- /dev/vdb mkpart primary ext4 0% 100% sudo mkfs.ext4 -L data-1 /dev/vdb1
Info You may partition the disk differently and use any other filesystem type. It is a good idea to use the same name for the volume to set the label of the new filesystem
Add this entry to your VM's /etc/fstab, adapting the label to the name you chose earlier:
No Format echo "LABEL=data-1 /data1 ext4 defaults 0 0" | sudo tee -a /etc/fstab > /dev/null
Make the directory where you are mounting your filesystem. Make sure you use the same path as defined in fstab:
No Format sudo mkdir /data1
Mount the file system
No Format sudo mount -av
...