Power failure
The SAN Volume Controller node uses battery power from the uninterruptible power supply to shut itself down.
The Power failure display on the laptop application shows that the SAN Volume Controller is running on battery power because main power has been lost. All I/O operations have stopped. The node is saving system metadata and node cache data to the internal disk drive. When the progress bar reaches zero, the node powers off.
Note: When input power is restored to the uninterruptible power
supply, the SAN Volume Controller turns on.