I was busy with some performance troubleshooting on our SharePoint 2013 farm today. And again I got frustrated with the fact that the disk performance counters could not be seen in Task Manager.
I found out how to add the counter to Task Manager in Windows Server 2012 (R2)
Start by pressing Winkey-X and start an elevated Command Promt:
In the command prompt run the following command:
The result should look something like this:
After this, restart your Task Manager and the Disk Performance Counters should be visible !