Storage is full for no reason

[fawzy46]

I am running OpenWrt 21.02 rc3 (ext4 image) on x86 Machine and suddenly my free space on /dev/root is zero and I can't install any new packages. I have the same amount of packages used when I was on 19.07 if not even less with the same configuration and everything. this is the output when I run the df command. does anyone know what is the problem?

`

root@OpenWrt:~# df -h`

`Filesystem Size Used Available Use% Mounted on`

`/dev/root 102.4M 102.3M 0 100% /`

`tmpfs 238.6M 352.0K 238.2M 0% /tmp`

`/dev/sda1 15.7M 4.8M 10.7M 31% /boot`

`/dev/sda1 15.7M 4.8M 10.7M 31% /boot`

`tmpfs 512.0K 0 512.0K 0% /dev`

`/dev/sda3 14.1G 49.9M 13.3G 0% /mnt/sda3`

also, I have some very small files on the system, and when I try to remove them the following error shows up which is not usual.
can't remove 'install.sh': Read-only file system

[mk24]

This usually results from writing log files to a persistent location on the / filesystem instead of /tmp. Use du to explore the total usage of each directory. After finding and stopping the process that is overfilling the system, remount read-write and delete the extra files.

[fawzy46]

I did run du and the total is way less than the size of the root partition

`root@OpenWrt:/# du -shx *`
`620.0K bin`
`4.7M boot`
`0 dev`
`1.0M etc`
`5.7M lib`
`0 lib64`
`4.0K lost+found`
`4.0K mnt`
`4.0K overlay`
`0 proc`
`8.0K rom`
`24.0K root`
`820.0K sbin`
`0 sys`
`356.0K tmp`
`19.4M usr`
`0 var`
`1.2M www`

I think I found the problem, for some reason sda2 (the root partition) is mounted as read-only and I don't know why or how to fix it. i tried to reboot but that did not help

[mk24]

Check the log it is probably filesystem error which you must fix manually with fsck. OpenWrt by default doesn't automatically try to repair filesystems.

[fawzy46]

thanks, i ran e2fsck and now every thing is working fine. is there a way to make e2fsck run automatically at boot?

[vgaetera]

https://openwrt.org/docs/guide-user/storage/fstab?s=check_fs#the_global_section