Jetson TK1: SD recovery disk?

Is it possible to boot into the SD card?

I ask because this is how I reflash/service the BeagleBone black when I use it as an embedded system. I am experimenting with the Jetson TK1 hardware and it would be helpful if I had a recovery OS for when I brick it.

“bricking” jetson can be fixed by reflashing the internal emmc through usb from x86 linux host computer.

As for booting from sdcard, the simpliest way is to flash l4t r19.3 with uboot bootloader, then sdcard will boot first if bootable and inserted