LS421DE - How do you clear an error message (red blinking LED) after removing HD

[rgarjr]

So I had 2 drives inside the NAS in JBOD.  I decided to remove of the drives and now I have this error message that my disk has failed.  Obviously I removed the drive but I can't seem to clear the message for it to stop telling me. 

[davo]

Did you remove it from the admin page first before physically removing it from the Linkstation>?

[rgarjr]

Problem is there's no option to remove a disk on there. There's a button that says unmounted disk but it was greyed out and unable to use it.