Your customer has established a new virtual pool of storage containing NL-SAS drives in a RAID 5 configuration. Recently they have noticed that performance on the entire array is affected between 1:00AM and 4:00AM.
What information would best indicate the root cause?
A. More than 21 forced flushes per second
B. SP utilization greater than 71%
C. Large sequential writes
D. HWM set to 60%; LWM set to 40%
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