RN314 don't boot anymore after trying to fix "no space left on device" error.

I ran it here is the result

root@readynas:/tmp#  btrfs inspect-internal inode-resolve 278 //
ERROR: ino paths ioctl: No such file or directory
root@readynas:/tmp# ls -il /
total 48
      256 drwxrwxr-x   1 root  root   674 Dec 24 16:27 apps
      257 drwxr-xr-x   1 root  root  1738 Mar 16  2024 bin
      374 drwxr-xr-x   1 root  root     0 May 21  2012 boot
 12249745 -rwxr-xr-x   1 root  root  4160 Jun  4  2013 cp_check_md5sums.sh
      256 drwxr-xr-x   1 root  root   586 Dec 24 16:55 data
     1025 drwxr-xr-x  16 root  root  3380 Dec 24 16:01 dev
      422 drwxr-xr-x   1 root  root  3574 Nov 23 12:22 etc
194065248 drwxr-xr-x   1 root  root    54 Mar 16  2024 frontview
    89278 -rw-r--r--   1 root  root     0 Jun 18  2014 ftp_ban.tbl
      256 drwxr-xr-x   1 admin admin   28 Mar 17  2018 home
     9699 lrwxrwxrwx   1 root  root     5 Jun 18  2014 homes -> /home
     1320 drwxr-xr-x   1 root  root   822 Mar 16  2024 lib
    12093 drwxr-xr-x   1 root  root  1304 Aug 15  2017 lib32
     2197 drwxr-xr-x   1 root  root    40 Mar 16  2024 lib64
     2199 drwxr-xr-x   1 root  root     0 Mar 23  2024 media
     2200 drwxr-xr-x   1 root  root    26 Jan 25  2016 mnt
     2201 drwxr-xr-x   1 root  root    98 Oct 11  2022 opt
193170984 drwxr-xr-x   1 root  root     4 Aug 26  2023 path
        1 dr-xr-xr-x 328 root  root     0 Dec 24 16:00 proc
     2351 drwx------   1 root  root   620 Dec 24 16:56 root
     1235 drwxrwxr-x  28 root  admin 1080 Dec 24 16:02 run
     2355 drwxr-xr-x   1 root  root  2944 Mar 16  2024 sbin
     2510 drwxr-xr-x   1 root  root     0 Feb 28  2012 selinux
     2511 drwxr-xr-x   1 root  root     0 Jun  4  2012 srv
        1 dr-xr-xr-x  12 root  root     0 Dec 24 16:40 sys
188474452 -rw-------   1 root  root    18 Feb 21  2024 syslog
     2513 drwxrwxrwt   1 root  root   178 Dec 25 20:07 tmp
     2514 drwxr-xr-x   1 root  root   112 Oct 11  2022 usr
     8070 drwxr-xr-x   1 root  root   188 Mar 16  2024 var
181144103 drwxr-xr-x   1 root  root    42 May  7  2022 yacht
root@readynas:/tmp#

Then I do not no which file(s) is(are) corrupted.

But by curiosity I ran again btrfs balance // and this time it stopped with a "no space left on device" error message. I ran several times with the same error message, but when I run "", the allocated space was no more 4.0GB 8-), there is progress.

root@readynas:/tmp# btrfs fi df -H //
Data, single: total=2.59GB, used=2.23GB
System, DUP: total=33.55MB, used=16.38kB
Metadata, DUP: total=134.22MB, used=42.73MB
GlobalReserve, single: total=33.55MB, used=0.00B
root@readynas:/tmp# btrfs fi usage /
Overall:
    Device size:                   4.00GiB
    Device allocated:              2.72GiB
    Device unallocated:            1.27GiB
    Device missing:                  0.00B
    Used:                          2.16GiB
    Free (estimated):              1.61GiB      (min: 993.96MiB)
    Data ratio:                       1.00
    Metadata ratio:                   2.00
    Global reserve:               32.00MiB      (used: 0.00B)

Data,single: Size:2.41GiB, Used:2.08GiB
   /dev/md0        2.41GiB

Metadata,DUP: Size:128.00MiB, Used:40.75MiB
   /dev/md0      256.00MiB

System,DUP: Size:32.00MiB, Used:16.00KiB
   /dev/md0       64.00MiB

Unallocated:
   /dev/md0        1.27GiB
root@readynas:/tmp#  ls -al /var/cores/core-readynasd
-rw------- 1 root root 281935872 Aug 16  2018 /var/cores/core-readynasd
root@readynas:/tmp#  ls -alh /var/cores/core-readynasd
-rw------- 1 root root 269M Aug 16  2018 /var/cores/core-readynasd
root@readynas:/tmp#