Missing Disk performance counter from Task Manager 2012 R2 Posted on May 19, 2014June 6, 2014 by Gonzalo Escarrá If you’re missing the nice little graph and metrics that show in your Task Manager’s Performance tab on Windows 8 and 8.1, but not on 2012 and 2012 R2, all you have to do is run: diskperf -Y Before: After: Share:Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Twitter (Opens in new window)MoreClick to email a link to a friend (Opens in new window)Click to print (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Pinterest (Opens in new window)