One of the Hard Drives installed on our server is lit up and has a symbol on it. (Image Attached) it looks as though it is just a case of the message saying the disk cannot be ejected.
Those lights can turn on for a variety of reasons, not all mean the drive is bad. Best to check as suggested above. I had one a few weeks ago that came on because one of the partitions was nearing 100% capacity. I'm pretty sure nothing in the drive knows that, so there must have been a way for the drivers or software to signal that drive to turn on its light.
Log onto the server, you'll have the HP server homepage in your HP system tools. Log onto that and it'll tell you exactly what the issue is.
I never work just off of the lights...
Cheers
Alex