In Windows Server 2012 R2, disk performance counters were disabled by default because of a noted significant performance impact in collecting Disk metrics on a Server. This is due to the overhead Task Manager can cause when querying each Disk IO for each process/thread on the individual disk. Interestingly enough disk resource values are visible in the Processes view of Task Manager found on Step 1: Enabling Disk Performance Counters
- Ensure Task Manager is closed.
- Launch the Command Prompt using the “Run as Administrator” option.
- Enter the following at the Command Prompt:
- Hit Enter.
- Close the Command Prompt.
- Re-open the Task Manager.
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