If the Back-End Storage Performance of an N8500 Storage System

Multiple Choice

If the back-end storage performance of an N8500 storage system deteriorates, which of the following items can be skipped during troubleshooting?

A) Whether the sharing services are disabled
B) Whether the batteries on the storage units are faulty
C) Whether a link between the engine and a storage unit is down
D) Whether the storage system has slow disks