$ grep -rnw '/mnt/media/boot/' -e 'UUID'; grep -rnw '/mnt/etc/' -e 'UUID' 2>/dev/null; sudo blkid | grep mmcblk1
# results 
/mnt/media/boot/boot.ini:166:setenv bootrootfs "console=tty1 console=ttySAC2,115200n8 root=UUID=8e21052d-2fa6-4016-9d13-ef7bf1381ea5 rootwait ro fsck.repair=yes net.ifnames=0"
/mnt/media/boot/boot.ini.default:34:#bootrootfs=console=tty1 console=ttySAC2,115200n8 root=UUID=8e21052d-2fa6-4016-9d13-ef7bf1381ea5 rootwait ro fsck.repair=yes net.ifnames=0
/mnt/etc/fstab:1:UUID=8e21052d-2fa6-4016-9d13-ef7bf1381ea5 / ext4 errors=remount-ro,noatime 0 1
/mnt/etc/fstab:2:UUID=BD14-46F4 /media/boot vfat defaults 0 1
/dev/mmcblk1: PTUUID="3cedfd53" PTTYPE="dos"
/dev/mmcblk1p1: SEC_TYPE="msdos" LABEL="boot" UUID="BD14-46F4" TYPE="vfat" PARTUUID="3cedfd53-01"
/dev/mmcblk1p2: LABEL="rootfs" UUID="8e21052d-2fa6-4016-9d13-ef7bf1381ea5" TYPE="ext4" PARTUUID="3cedfd53-02"