Hi Asoka Chang,
can youplease post some details? What do you mean with "DB Engine Health service error"? How does the alert look like, what information does it contain?
What is a 4221 error? can you please elaborate?
In order to be able to help you in a correct way some additional technical details are needed: Which SCOM Version (and also whcih UR) does you customer have? What version of the SQL MP are you using?
Many thanks in advance!
Regards,
Stoyan