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Since it is also possible to start Jupyter sessions with ecinteractive, you should avoid running two JupyterLabs at the same time with each tool. They run on the same platform using the same HOME filesystem, so you may run into unexpected behaviour or Jupyter cache or configuration corruption..
Accessing other filesystems beyond your HOME
Your Jupyter instance will always start with HOME as your top level directory. In order to access any other of your storage spaces in the Atos HPCF or ECS, you will need to