EMC Exam Questions

How would you explain the peak in response times given the overall performance profile shown?

You work as an administrator at ABC.com. You study the exhibit carefully.
Exhibit:

ABC.com has collected response time performance data from their CLARiiON array. They are
experiencing periodic increases in overall array response times. They have created a graph of the
data that is displayed in the exhibit.
The customer has a CX3-40 with 22 Windows hosts and replicates data with MirrorView/A
periodically throughout the day. How would you explain the peak in response times given the
overall performance profile shown?

A.
Failover Mode is not set to 1 forPowerPath, causing unbalanced I/O on the array

B.
Asymmetric Logical Unit Access ismisconfigured on the array and causing the SPs to be
unbalanced

C.
Copy on First Write activity associated withMirrorView/A is causing an increase in response
times

D.
Forced flushing of the cache is causing the array performance to spike and gradually return to
normal