I was teaching a Windows Server 2012 Workshop in Oklahoma City this week and a student pointed out that the disk counters can be loaded into task manager in the same way as they can be in Windows 8. Here is the Windows 8 view, for instance:
And here is the default view for Windows Server 2012 (no disk counters):
But if you type in diskperf –Y it will add them:
Thanks to Adam Gaglione (who in turn thanks Sean Shannon) from Dell for the tip!!