(1), how many arrays are made up of several disks on two servers? What system have you made? Is there a hot standby between the two servers? For example, dual-machine Rose, Pluswell, and the system comes with clusters.
② What is the array of five disks on the external direct-attached storage MSA500G2? Did you add Hotspare?
③ Is there a Rebuid array after adding storage?
The red light on the server is an internal health light, and there may be hardware problems. It's best to collect logs and let 800 give you a judgment. The red light in front of 500G2 gives an alarm. See if there is an alarm in the back! It's best to feed back all these questions to 800 and let them help you analyze them.