There are several LED indicator lights on the front panel or bezel of the Dell MD386f storage array. If any of them are amber color (either blinking or solid), it could indicate a problem with the array.
The following are the front-bezel indicators and what each of them means.
If there are no error messages in the logs and everything shows Optimal, but the light is still on, power cycle the entire storage array including removing the power cables and waiting for all power to completely drain from the power supplies. Then plug power back in and power the storage array back up.