Been using a WNDR3700v1 flawlessly for many many years so you didn't hear from me on this forum before.
Right now I am unable to install or uninstall anything from Luci app or even opkg cmdline on ssh. - the overlayfs is almost full and read-only.
Filesystem Size Used Available Use% Mounted on /dev/root 2.5M 2.5M 0 100% /rom tmpfs 29.1M 3.0M 26.1M 10% /tmp /dev/mtdblock5 3.5M 3.4M 92.0K 97% /overlay overlayfs:/overlay 3.5M 3.4M 92.0K 97% / tmpfs 512.0K 0 512.0K 0% /dev
A few months back I installed unbound to experiment with DNS over TLS for a quick review but I started seeing freezes and hangs with crash messages (especially when tried to reverse name resolve all the IPs in the connection pool) . Also I could not track the TLS connections and I suspected it wasn't working. So I went back to dnsmasq. Installed/uninstalled twice like this and I suspect this was the trigger for the problems I having today. The 3rd attempt at using unbound a few weeks later was also similar but I have been unable to uninstall ever since. Now I wanted to install packages to samba share files via USB when I noticed the problem. Nothing can be uninstalled or installed because it is read-only.
/tmp# 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) /dev/mtdblock5 on /overlay type jffs2 (rw,noatime) overlayfs:/overlay on / type overlay (**ro**,noatime,lowerdir=/,upperdir=/overlay/upper,workdir=/overlay/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)
mount -orw -oremount /overlay does not work.to make it rw.
I went through the older threads but since uninstalling unwanted apps like unbound is not an option. I tried manually deleting files from /overlay/upper/usr/lib/unbound but it only removed 200k.
du -h -d1 440.0K ./bin 0 ./dev 706.5K ./etc 3.1M ./lib 0 ./mnt 6.5M ./overlay 0 ./proc 7.1M ./rom 0 ./root 433.0K ./sbin 0 ./sys 3.0M ./tmp 8.1M ./usr 674.5K ./www 30.0M .
Running the latest 19.0.7 lede 4.14.171 #0 Thu Feb 27 21:05:12 2020 mips GNU/Linux
I dont have too many apps installed really and not sure if a reset will help either. I just use dnsmasq and dhcp and collectd to report cpu/mem/net/wifi etc. Rebooting has not helped. Sysupgrade is also failing:
/tmp# sysupgrade ./openwrt-19.07.3-ath79-generic-netgear_wndr3700-squashfs-sysupgrade.bin
Image check failed.
What to do now?
Thanks for your advice on this.