Can overwrite /overlay filesystem in OpenWrt break JFFS2

Installing and Using OpenWrt
1

Hi all,

I want to download my code and python site-packages to module MT7688 by using .zip file to /overlay/upper folder.
Here is what I do:

  1. Send command to download code from server (.zip) file)
  2. unzip to /overlay/upper
  3. Reboot and execute the program
    I have a question: Can overwrite overlay filesystem in OpenWrt break JFFS2 filesystem ?
    Because: after Doing this, the module work fine, but after few time powering up, it get brick.
    image
    image1920×1080 188 KB
2

After enter failsafe mode, I see no file in jffs2reset filesystem

BusyBox v1.23.2 (2015-11-18 16:34:33 CET) built-in shell (ash)

ash: can't access tty; job control turned off
  _______                     ________        __
 |       |.-----.-----.-----.|  |  |  |.----.|  |_
 |   -   ||  _  |  -__|     ||  |  |  ||   _||   _|
 |_______||   __|_____|__|__||________||__|  |____|
          |__| W I R E L E S S   F R E E D O M
 -----------------------------------------------------
 CHAOS CALMER (15.05+linkit, r47501)
 -----------------------------------------------------
  * 1 1/2 oz Gin            Shake with a glassful
  * 1/4 oz Triple Sec       of broken ice and pour
  * 3/4 oz Lime Juice       unstrained into a goblet.
  * 1 1/2 oz Orange Juice
  * 1 tsp. Grenadine Syrup
 -----------------------------------------------------
================= FAILSAFE MODE active ================
special commands:
* firstboot          reset settings to factory defaults
* mount_root     mount root-partition with config files

after mount_root:
* passwd                         change root's password
* /etc/config               directory with config files

for more help see:
http://wiki.openwrt.org/doc/howto/generic.failsafe
=======================================================

root@(none):/# [    9.230000] rt305x-esw 10110000.esw: link changed 0x01
df -h
Filesystem                Size      Used Available Use% Mounted on
rootfs                   19.8M     19.8M         0 100% /
/dev/root                19.8M     19.8M         0 100% /
tmpfs                   512.0K         0    512.0K   0% /dev
tmpfs                    61.8M     16.0K     61.7M   0% /tmp
root@(none):/#root_mount
ash: root_mount: not found
root@(none):/# mount_root
[   44.450000] jffs2: notice: (389) jffs2_build_xattr_subsystem: complete building xattr subsystem, 0 of xdatum (0 unchecked, 0 orphan) and 0 of xref (0 dead, 0 orphan) found.
[   44.500000] mount_root: switching to jffs2 overlay
root@(none):/# ls
root@(none):/# df -h
root@(none):/# ls
root@(none):/# df -h
root@(none):/# ls
root@(none):/# ls
root@(none):/# ls
root@(none):/# ls
root@(none):/# [   77.300000] random: nonblocking pool is initialized
ls
root@(none):/# ls
root@(none):/# ls
root@(none):/#
root@(none):/# mount_root
[  172.020000] mount_root: rootfs_data:/dev/mtdblock6 is already mounted as /overlay
root@(none):/# df -h
root@(none):/# ls
root@(none):/#
3

still same old release, still too old, still ask your vendor, or upgrade.