If your router lost chains on the flash:/ or cfcard:/ you can try to rebuild the file system. The principal symptom is that you can’t save the running config.
So try the miracle:
<Huawei_lab>dir /all
Directory of flash:/
Idx Attr Size(Byte) Date Time FileName
0 drw- - Aug 23 2016 03:00:57 dhcp
1 drw- - Aug 23 2016 03:00:16 user
2 drw- - Apr 02 2000 18:26:37 logfile
3 -rw- 1,756 Jun 04 2000 04:17:27 vrpcfg.zip
4 drw- - Aug 23 2016 03:00:03 $_install_mod
5 -rw- 836 Aug 23 2016 03:01:00 3rr.bak
6 -rw- 836 Aug 23 2016 03:01:00 _rr.dat
7 -rw- 1,003 Aug 23 2016 03:00:48 private-data.txt
8 drw- - May 11 2000 03:12:41 localuser
9 drw- - Apr 02 2000 01:55:50 $_backup
10 -rw- 64,011,164 Dec 15 2016 17:51:28 s5720li-v200r010c00spc600.cc
244,163 KB total (160,108 KB free)
<Huawei_lab>fixdisk flash:
Fix disk flash: will take long time if needed.
% Fix disk flash: completed.
bye,
.glitchlist crew