[FS#3298] Edimax 3G-6200n z OpenWrt 19.07.2 lost settings after reboot or turnoff. It don't create JFFS

[OpenWrt Bugs]

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User who did this - olekstomek (olekstomek) 

Attached to Project - OpenWrt/LEDE Project
Summary - Edimax 3G-6200n z OpenWrt 19.07.2 lost settings after reboot or turnoff. It don't create JFFS
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Critical
Priority - Very Low
Reported Version - openwrt-19.07
Due in Version - Undecided
Due Date - Undecided
Details - [[https://openwrt.org/toh/hwdata/edimax/edimax_3g-6200n|Edimax 3G-6200n]]
OpenWrt 19.07.2, r10947-65030d81f3

Steps:
1. Download the latest version OpenWrt 19.07.2 to Edimax 3G-6200n. 
2. Set e.g. the password to the router and/or turn on the WiFi. 
3. Reboot the router with the reboot option in OpenWrt. 
4. The router has no settings previously saved - the status is as right after installing fresh OpenWRT - no password, no WiFi enabled, default settings.

Problem with JFFS.

root at OpenWrt:~# mount
/dev/root on /rom type squashfs (ro,relatime)
proc on /proc type proc (rw,nosuid,nodev,noexec,noatime)
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,noatime)
tmpfs on /tmp type tmpfs (rw,nosuid,nodev,noatime)
tmpfs on /tmp/root type tmpfs (rw,noatime,mode=755)
overlayfs:/tmp/root on / type overlay (rw,noatime,lowerdir=/,upperdir=/tmp/root/upper,workdir=/tmp/root/work)
tmpfs on /dev type tmpfs (rw,nosuid,relatime,size=512k,mode=755)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,mode=600,ptmxmode=000)
debugfs on /sys/kernel/debug type debugfs (rw,noatime)
root at OpenWrt:~# df -h
Filesystem                Size      Used Available Use% Mounted on
/dev/root                 3.0M      3.0M         0 100% /rom
tmpfs                    13.8M    284.0K     13.5M   2% /tmp
tmpfs                    13.8M     60.0K     13.7M   0% /tmp/root
overlayfs:/tmp/root      13.8M     60.0K     13.7M   0% /
tmpfs                   512.0K         0    512.0K   0% /dev

root at OpenWrt:~# free
              total        used        free      shared  buff/cache   available
Mem:          28276       14008        5224         344        9044       11872
Swap:             0           0           0
#here I added the password and turned on the WiFi network - the free RAM decreased
root at OpenWrt:~# free
              total        used        free      shared  buff/cache   available
Mem:          28276       15632        3496         368        9148       10236
Swap:             0           0           0
root at OpenWrt:~#

More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=3298

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