Data Volume was in degraded mode. However the drive status show good all

The WD Sharespace (4TB) gave error message that Data Volume was in degraded mode. However the drive status show good all.

I would like to know how to clear degraded mode from Manage Volume Menu.
I aware that my 4 HD Status will have some problem.

From what you have stated it appears that the sharespace has malfuntioned and needs to be replaced.

Try contacting WD tech support on that issue.