Call the customer.
Verify full system functionality and if applicable implement preventative measures.
Establish a theory of probable cause. (Question the obvious.)
Test the theory to determine cause.
Identify the problem
RAID 1 is striped, whereas RAID 0 is not.
RAID 1 is a mirror (backup) of one drive.
RAID 0 is a mirror (backup) of one drive.
RAID 0 is faster than RAID 1.
RAID 1 is faster than RAID 0.
It doesn't matter
Surge Protection Only side of a UPS.
Directly into the wall outlet.
Battery Backup / Surge Protection side of a UPS.
Identify the Problem
Escalate the problem
Perform a backup
Establish a plan of action
Document your actions so far