1st of all we need to format the partition
the command of formatting the partition is
$mkfs.ext4 /dev/xvdf
then we have to mount the partition to another directory for example we mount the partition on /opt directori. so now we have to cmnd
$mount /dev/xvdf /opt
So now our new volume is mounted on the /opt directory. But not visible. we can check it using the command
$df -h
Now we have to do visible this partition to the /opt directory
===================Another way====================
df -h
lsblk
growpart /dev/xvda1
lsblk -f
trdoxr2fs /dev/xvda1
Now check the size.