if the error doesnt correct itself after some time, you will need to power cycle the system that the MD3000 is connected to, and that should resolve the message. Just to confirm, your sata drive has an interposer board to connect to the MD3000? 
I have a MD3000. I bought a 1T SATA drive from Dell. The MD3000 didn't recognize the new drive. Dell had me update the MD3000 from gen I to gen II. and flash the drive. Now the drive is recognized but I get the following error. "Physical Disk - Loss of Path Redundancy" I have two drives and they both have the error. Any idles? To my knowledge the new drives have never had a redundant path.
Physical Disk - Loss of Path Redundancy