Using fdisk (p command), I saw the partition table /dev/mmcblk0.
This result is following…
Devices Boot Start End Blocks Id System
/dev/mmcblk0p1 1 22103 265231+ ee EFI GPT
and Using v command
14739416 unallocated sectors
cat /etc/fstab
# stock fstab - you probably want to override this with a machine specific one
/dev/root / auto defaults 1 1
proc /proc proc defaults 0 0
devpts /dev/pts devpts mode=0620,gid=5 0 0
tmpfs /run tmpfs mode=0755,nodev,nosuid,strictatime 0 0
tmpfs /var/volatile tmpfs defaults 0 0
# uncomment this if your device has a SD/MMC/Transflash slot
#/dev/mmcblk0p1 /media/card auto defaults,sync,noauto 0 0
I used following command when I made a bootable SD card.
$ sudo fastboot flash boot boot-dragonboard-410c.img
$ sudo fastboot flash rootfs agl-demo-platform-dragonboard-410c.ext4
Automotive Grade Linux on dragonboard410c - Part 1 - 96Boards
Should I use fdisk to extend the partion of /dev/mmcblk0?