NETGEAR has identified a possible issue with the ReadyNAS 3130 that may cause an error to pop-up.
Symptoms:
Your RN3130 reports the error: "Vcore voltage in enclosure 'Internal' is out of spec" as shown below:

This warning is a false alarm which can be resolved by updating to the latest ReadyNAS OS version (6.2.3 or newer). You can find the latest version under the firmware/software section of the RN3130 support page.