Adjustments made on the Red Range (e.g. gain setting on Inputs) will automatically save to the hardware to recall later upon power cycling the unit. However, please allow 5 seconds to pass for the setting changes to save to the flash memory of the Red interface prior to powering off the unit.
By default, the phantom power status on applicable inputs will always revert to Off when a Red is power cycled. To change this behaviour enter the Global menu on the front panel of the Red and select the "Pre+48V" Retain option.