During a proof of concept, ABC.com 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.
Windows file systems were not aligned on LUNs withdiskpar or diskpart

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

C.
Windows file system caching is interfering withCLARiiON caching

D.
CLARiiON cache watermark has been reached and is destaging