I am not sure. But, doubt if this "get-ncdiskpartition" even exist.
I am looking at following pdf:
https://www.netapp.com/media/16861-tr-4475.pdf
Page -31
Section - Disk commands
These are the only commands mentioned with Get-NcDisk*:
Get-NcDisk = Gets disk information about one or more disks
Get-NcDiskOwner = Gets disk ownership information
Get-NcDiskOwnerFiler = Gets storage system information
For Windows Disk (Non NetApp PowerShell cmdlet module):
Get-Partition = This will work as windows Standard PowerShell command.