During a proof of concept, a customer who is using a CLARiiON array with four Windows servers notices I/O performance problems on a specific server. Looking at Navisphere Analyzer data for the LUNs in question and comparing the statistics with the System Monitor (PerfMon) I/O counters for the same Windows physical disks, the I/O statistics in Navisphere Analyzer are significantly higher than the System Monitor shows.
What is the likely reason for this performance issue?

A.
CLARiiON cache watermark has been reached and is destaging

B.
CLARiiON Write Cache has been disabled on the affected LUNs

C.
Windows file system caching is interfering with CLARiiON caching

D.
Windows file systems were not aligned on LUNs with diskpar or diskpart