What is the best way to find all volumes within a cluster that do not have a SnapMirror/SnapVault/Load Sharing relationship? I was going to use PowerShell but I was not able to find the PowerShell command corresponding to CLI snapmirror list-destinations.
I think the CmdLet you are looking for is "Get-NcSnapmirrorDestination". Also you can use "Invoke-NcSsh" for any command line operation that does not have a corresponding PowerShell CmdLet. You might also consider querying the OCUM database for this information. Here is an example using powershell (modify the sql query to meet your requirements)