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For Windows and Linux servers are the below datasource and datapoints correct.

Linux Servers
CPU Utilization-->Datasource: NetSNMPCPUwithCores DataSource Point:AvgCPUUtilization
Memory Utilization-->Datasource: :NetSNMP_Memory_Usage DataSource Point:MemoryUtilizationPercent
Drive Utilization-->Datasource:snmpHRDisk DataSource Point: PercentUsed
Disk IOps-->NetSNMPdiskIO  DataSource Points: ReadOperations, WriteOperations

Windows
CPU Utilization-->Datasource: WinCPU DataSource Point:AvgCPUUtilization
Memory Utilization-->Datasource:WinOS Memory DataSource Point:MemoryUtilizationPercent
Drive Utilization-->Datasource: WinVolumeUsage DataSource Point: PercentUsed
Disk IOps-->Disk IO:WinLogicalDrivePerformance DataSource Point: AvgDiskSecPerRead AvgDiskSecPerWrite