Document URL: https://docs.openshift.com/container-platform/3.11/install/host_preparation.html#configuring-docker-storage

Section Number and Name: Configuring Docker Storage

Describe the issue: documentation does not add a note to warn regarding known issues regarding utilizing devicemapper as using devicemapper gets error:

"Error starting daemon: error initializing graphdriver: devmapper: Unable to take ownership of thin-pool (docker--vg-docker--pool) that already has used data blocks' error"

Suggestions for improvement: Add a section for known issues with the types 
Example:
[known issues]
devicemapper has problems initializing graphdriver as it is unable to take ownership of thin-pool

And/Or
Add a recommendation to use overlay2 by default.

Additional information: 
Case #02422021