Hello, I'm designing a small board using the LS1012A to store Ethernet data to CFast 2.0 memory card. I plan to run Linux on the LS1012A to make the software development easy. I will need to design a backup power supply to power down the board if the main input power is cut. How long does it take to power down a Linux kernal? This will determine how much of reserve power I will need to design for. I image it will take a little time to stop writing to the file and then initiate a power down on the Linux OS.