Docker Block Device
The Cloudera Data Science Workbench installer will format and mount Docker on each gateway host.
Make sure there is no important data stored on these devices. These devices should be of type "disk" - do not use lvms. When running "lsblk", you should see Disk listed in the Type column. Do not mount or format the Docker Block Devices before installing Cloudera Data Science Workbench. Ensure that these devices are formatted as disks and are not LVMs. The "lsblk" output should simply say "disk" under the Type column.
Every Cloudera Data Science Workbench gateway host must have one or more block devices with at least 1 TB dedicated to storage of Docker images. The Docker block devices store the Cloudera Data Science Workbench Docker images including the Python, R, and Scala engines. Each engine image can occupy 15GB.