Hoffman (technically now Hoffman2) is a computational cluster hosted by UCLA that CNL subscribes to. It is hosted on main campus and therefore cannot “see” the long-term storage server hosted by Semel IT.
See: https://www.ccn.ucla.edu/wiki/index.php/Hoffman2:Introduction for way more info.
Crucially, Hoffman2 has its own extensive Wiki which explains how to do many common computational tasks: https://www.hoffman2.idre.ucla.edu/
For example, if you want to run a JupyterLab notebook on Hoffman, see: https://www.hoffman2.idre.ucla.edu/Using-H2/Connecting/Connecting.html?highlight=jupyter#connecting-via-jupyter-notebook-lab
For new users looking to obtain a Hoffman account: https://www.hoffman2.idre.ucla.edu/Accounts/Requesting-an-account.html