nx3550-F 交换机启动提示如下,不能进系统U-Boot SPL 2013.10-g886bae9 (Sep 08 2016 - 11:58:12)The Expected Linux image was not found. Please check your NAND configuration.Trying to start u-boot now...U-Boot 2013.10-g886bae9 (Sep 08 2016 - 11:58:12)I2C: readyDRAM: 512 ...