While on-site troubleshooting a Dell EMC PowerStore system, the node B embedded module fault LED is blinking blue and amber alternating at one second intervals. What does this indicate?

According to the official Dell PowerStore hardware documentation, the node fault LED provides specific visual cues about the node's status. An LED that is blinking blue and amber alternately at a one-second (1 Hz) interval is the designated indicator that the node has been placed into Service Mode. This is a special state used by service personnel to perform maintenance, diagnostics, or recovery procedures that cannot be done while the node is in its normal operating state.

B. System is not initialized: An uninitialized system is typically indicated by a solid amber fault LED on the nodes.
C. Node is booting: A node that is booting is indicated by a blinking blue LED, not an alternating blue and amber pattern.
D. Node is in degraded mode: A node in a degraded state, such as when a component has failed but the node is still operational, is indicated by a blinking amber LED.

1. Dell PowerStore: Hardware Information Guide (for PowerStore 500T, 1200T, 3200T, 5200T, and 9200T Models). In the "Node LEDs" section, the table "Node fault LED states" explicitly states that an "Alternating blue/amber (1 Hz)" pattern indicates "Node is in Service Mode." (Document Part Number: 000203343, Page 23)

2. Dell PowerStore: Service Concepts Guide. In the chapter "Service Scripts," the section on "Service Mode" states: "When a node is in Service Mode, its fault LED blinks alternating blue and amber." (Document Part Number: 000184743, Page 34)