So you have a problem with S2D or you just fixed a problem and you want to try and figure out why it happened so it doesn't happen again. Execute the Get-ClusterDiagnosticInfo powershell script. It will create a zip file in c:\users\<username>\ that contains the cluster logs and all relavent events and settings. Do this right away so you have the data. You can always analyze it at a later date.