NC rsync via NC Web Panel

Hi together,

I try to use the backup option via rsync over the NC web panel.

I have the following constelation:

  • Raspbeery Pi 4 with an external HDD without SD-Card.
  • Synology NAS system which I would like to rsync with

I mount the backup directory from the Synology system to the my raspberry with the following script:

sudo mount -t cifs -o credentials=/appdata/config/passwd-nas,uid=1000,gid=1000,dir_mode=0700,file_mode=0600,vers=1.0 //<IP synology system>/backup/raspberry /media/nasbackup

Then I configure that passwordless access for the users “root” and “pi”.
On the raspberry console it’s working fine to logon with root or pi over ssh

pi@chickencoop:~ $ ssh root@192.168.178.60

Linux chickencoop 5.4.83-v7l+ #1379 SMP Mon Dec 14 13:11:54 GMT 2020 armv7l

The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
Last login: Thu Jan 28 18:51:18 2021 from 192.168.178.60

Wi-Fi is currently blocked by rfkill.
Use raspi-config to set the country before use.

root@chickencoop:~#

root@chickencoop:~# ssh pi@192.168.178.60

Linux chickencoop 5.4.83-v7l+ #1379 SMP Mon Dec 14 13:11:54 GMT 2020 armv7l

The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
Last login: Thu Jan 28 17:44:25 2021 from 192.168.178.60

Wi-Fi is currently blocked by rfkill.
Use raspi-config to set the country before use.

And also rsync works without problems if I do it manual:

root@chickencoop:/home/pi# rsync -e 'ssh -p 22' -aAv /home/pi/ /media/nasbackup/nc_data

sending incremental file list
./
.gnupg/
.gnupg/private-keys-v1.d/
.ssh/
rpi-clone/
rpi-clone/.git/
rpi-clone/.git/branches/
rpi-clone/.git/hooks/
rpi-clone/.git/info/
rpi-clone/.git/logs/
rpi-clone/.git/logs/refs/
rpi-clone/.git/logs/refs/heads/
rpi-clone/.git/logs/refs/remotes/
rpi-clone/.git/logs/refs/remotes/origin/
rpi-clone/.git/objects/
rpi-clone/.git/objects/info/
rpi-clone/.git/objects/pack/
rpi-clone/.git/refs/
rpi-clone/.git/refs/heads/
rpi-clone/.git/refs/remotes/
rpi-clone/.git/refs/remotes/origin/
rpi-clone/.git/refs/tags/

sent 1,952 bytes received 211 bytes 4,326.00 bytes/sec
total size is 222,199 speedup is 102.73

But via the NC web panel I get the following message:
2021-01-28 19_21_44-NextCloudPi Panel und 2 weitere Seiten - Persönlich – Microsoft​ Edge

Where’s my thinking error or what do I’m wrong?

Sadly I can’t help,

but as I plan to use rsync in the near future, once I have set up my NAS, I’d be very interested to hear how you solved this.
So please post the solution if you found one. thx