OrangePi Zero3: The method of prohibiting automatic expansion of the capacity of the rootfs partition in the TF card

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Chapt 3. Instructions for use of Debian/Ubuntu Server and Xfce desktop system

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Chapter 3 contents

3.6.2. The method of prohibiting automatic expansion of the capacity of the rootfs partition in the TF card

1) First burn the linux image of the development board to the TF card on the Ubuntu computer (Windows not available), and then re-plug and insert the TF card

2) Then the Ubuntu computer will automatically mount the partition of the TF card. If the automatic mounting is normal, use the ls command to see the following output

test@test:~$ ls /media/test/opi_root/
bin
sbin
boot dev etc home lib lost+found media
selinux srv sys tmp usr var
mnt
opt
proc root run

3) Then switch the current user to the root user on the Ubuntu computer

test@test:~$ sudo -i
[sudo] test
root@test:~#

4) Then enter the root directory of the linux system in the TF card and create a new file named .no_rootfs_resize

root@test:~# cd /media/test/opi_root/
root@test:/media/test/opi_root/# cd root
root@test:/media/test/opi_root/root# touch .no_rootfs_resize
root@test:/media/test/opi_root/root# ls .no_rootfs*
.no_rootfs_resize

5) Then you can uninstall the TF card, and then pull out the TF card and insert it into the development board to start. When the linux system starts, when the file.no_rootfs_resize is detected in the /root directory, the rootfs will not be automatically expanded.

6) After entering the Linux system after prohibiting automatic expansion of rootfs, you can see that the total capacity of the rootfs partition is only 4GB (the image of the desktop version is tested here), which is much smaller than the actual capacity of the TF card, indicating that the automatic expansion of rootfs is prohibited.

orangepi@orangepi:~$ df -h
Filesystem Size Used Avail Use% Mounted on
udev 925M 0 925M 0% /dev
tmpfs 199M 3.2M 196M 2% /run
/dev/mmcblk0p1 4.0G 3.2G 686M 83% /

7) If you need to re-expand the capacity of the rootfs partition in the TF card, just execute the following command, and then restart the Linux system of the development board.

Note, please execute the following commands under the root user.

After restarting, enter the Linux system of the development board again, and you can see that the rootfs partition has been expanded to the actual capacity of the TF card

root@orangepi:~# df -h Filesystem Size Used Avail Use% Mounted on udev 925M 0 925M 0% /dev

tmpfs 199M 3.2M 196M 2% /run /dev/mmcblk0p1 15G 3.2G 12G 23% /

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