Diskperf Not Installed

The "Diskperf Not Installed" error occurs when the Windows parameter sets cannot collect performance data because the Disk Performance Statistics Driver (Diskperf) is not active. This driver is essential for NCache to monitor disk-related performance metrics. By default, Diskperf resides in the I/O Manager disk driver stack above the fault-tolerant driver (Ftdisk.sys).

To check if Ftdisk is active in your current configuration, navigate to the Devices Control Panel.

How do I enable Disk Performance Counters for NCache?

To resolve this, you must manually run the Diskperf utility on the monitored Windows computer.

Prerequisites: You must be a member of the Local Administrator's group to execute these commands.

1. Open a Command Prompt with administrative privileges.

2. Execute the command relevant to your storage configuration:

   • diskperf -y: Enables counters for standard disk configurations.
   • diskperf -yv: Enables counters for mirror/stripe sets (non-contiguous partitions). Use this if your configuration includes Ftdisk.
   • diskperf: Displays the current status of disk counters (Enabled or Disabled).
   • diskperf -n: Disables all disk counters.

Important

• Remote Execution: To run this on a remote server, use the syntax diskperf \\computername.
• System Update: You must restart the computer after executing these commands for the changes to take effect.

See Also

Computer Name Not Found
No READ Access to the Perflib Subkeys
Unable to Connect to Server Node (Windows XP/ Windows 7 Machine)