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In both Windows 10 and Windows Server 2012R2, I am missing my C: drive (which is Hard Drive 0 or Disk 0) from the Performance tab in Task Manager.

This used to work with Windows 8.1.

Task Manager

Comparison of 8.1 (left) and 2012R2 Task Managers, on 2 different systems. They both have a C: drive though.

How can I configure the Performance tab to also show information for the first drive?

Update: Waid Johnson's answer worked well for one of the systems I am looking at. The system that is not working has Intel Rapid Storage Technology enabled, and there is a cache on Disk 1 that caches Disk 0.

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Only drives that have Write Caching enabled will show up in Taskmgr. So open device manager, select the drive, go to the option and activate write caching.

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  • Thanks for this! I never checked the Device Manager. Now I see that my disk 0 is missing, I only see disk 1. I never checked since my C: partition of disk 0 is very much present in explorer. I will investigate if that is due to Intel RST SSD caching and some glitch there. – Andreas Reiff Jul 30 '16 at 10:22
  • I will accept since this helped me to solve my problem. (Thanks @Waid Johnson again too!) After finding out that the device was missing from device manager, I uninstalled the Intel SATA controller and disabled the SSD cache of RST. After a reboot, disc 0 was in device manager again and also in task manager performance tab. After reenabling SSD cache, it has remained there, so it is working well enough. – Andreas Reiff Jul 30 '16 at 11:18
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    i have this enabled on both of my drives and its still missing, win2012 r2 – acme64 Oct 6 '17 at 13:45
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    @acme64 server hide it by default. Run diskperf -Y to enable it. this is not required for client systems, only for server. – magicandre1981 Oct 6 '17 at 14:48
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Try giving this a shot:

  1. Ensure Task Manager is closed.

  2. Launch the Command Prompt using the Run as Administrator option.

  3. Enter the following at the Command Prompt: 

    diskperf -Y

  4. Hit Enter.

  5. Close the Command Prompt.

  6. Re-open the Task Manager.

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    Thanks for the answer. Unfortunately, this has not changed anything. – Andreas Reiff Jul 29 '16 at 18:50
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    It did not work on Windows 10, it worked for the Windows 2012R2 system though. I will update the question, perhaps there is a link to Intel RST (SSD cache for C: drive) on the Win 10 system. – Andreas Reiff Jul 29 '16 at 18:58
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    worked for win2012 r2, thank you. – acme64 Oct 6 '17 at 13:47
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    Works on Server 2016 as well. – Robbie Crash Apr 10 '18 at 2:55
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    also worked on server 2019 – goodhyun Jan 3 '20 at 9:05

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