Which of the following disk performance counters shows the average disk queue length value?

A.
Average Disk Queue Length.

B.
Current Disk Queue Length.

C.
Both of the above.

D.
None of the above.

Explanation:
The Average Disk Queue Length counter shows the average disk queue length over time value.
Incorrect Answers:
B: The Current Disk Queue Length counter shows the current (immediate) number of outstanding requests as well as all requests in service, when the counter was monitored.
C: Average Disk Queue Length is the correct answer.
D: Average Disk Queue Length is the correct answer.
References:
Charles J. Brooks, Server+ Certification Exam Cram 2 (Exam SK0-002), QUE Publishing, Indianapolis, 2006, pp. 531-533.