Error: "Invalid signature - Failed to read from partition"

Symptom

During operation, a system message like this appears:

Environment

• IGEL OS 11.03 or higher

Problem 

A system partition has been invalidated, which prevents system components from being loaded.

Solution

1. Ensure that a valid update source is configured under System > Update > Firmware Update and the correct firmware is stored on the server. (For detailed information, see Firmware Update.) If the local Setup is not accessible, use the UMS.
2. Reboot the device.
   The device fetches the valid partition from the update source.