Download the Compatibility Guide below, check section 7 for OS versions compatibility.
Download the appropriate CLIENT StorNext version matching your OS version:
Download the StorNext 5 installation guide at bottom on this article, start the procedure at Chapter 5 "Installing StorNext and StorNext FX Client Software on Linux or Unix" page 135.
Troubleshoot client not mounting StorNext:
StorNext MDC vs OS update compatibility matrix:
StorNext 5.2 upgrade for SpycerBox or non HA MDS: