When I run blkid I get /dev/vda1   ...etc/dev/vda2   ...etcHowever, when I run df -h I do not see the second drive. I only see/dev/vda1  ...etc /devtmpfs   ...etc Is this because df only shows file systems that are mounted, and the vda2 drive is not mounted? Can you help me understand the difference between the two and why df -h doesnt show the second drive vda2 ? 
difference between output of df and blkid
disk usage