Error with dump on NAS

[denisb88]

Hello everyone
Could someone please tell me what is wrong with my backup on my Synology NAS? The backup starts normally and then at the end I get these errors.

INFO: creating vzdump archive '/mnt/pve/DS224/dump/vzdump-lxc-102-2025_07_28-10_27_29.tar.zst'
INFO: tar: /mnt/pve/DS224/dump/vzdump-lxc-102-2025_07_28-10_27_29.tmp: Cannot open: Permission denied
INFO: tar: Error is not recoverable: exiting now
INFO: cleanup temporary 'vzdump' snapshot
Logical volume "snap_vm-102-disk-0_vzdump" successfully removed.
ERROR: Backup of VM 102 failed - command 'set -o pipefail && lxc-usernsexec -m u:0:100000:65536 -m g:0:100000:65536 -- tar cpf - --totals --one-file-system -p --sparse --numeric-owner --acls --xattrs '--xattrs-include=user.*' '--xattrs-include=security.capability' '--warning=no-file-ignored' '--warning=no-xattr-write' --one-file-system '--warning=no-file-ignored' '--directory=/mnt/pve/DS224/dump/vzdump-lxc-102-2025_07_28-10_27_29.tmp' ./etc/vzdump/pct.conf ./etc/vzdump/pct.fw '--directory=/mnt/vzsnap0' --no-anchored '--exclude=lost+found' --anchored '--exclude=./tmp/?*' '--exclude=./var/tmp/?*' '--exclude=./var/run/?*.pid' ./ | zstd '--threads=1' >/mnt/pve/DS224/dump/vzdump-lxc-102-2025_07_28-10_27_29.tar.dat' failed: exit code 2
INFO: Failed at 2025-07-28 10:27:30

 

[Impact]

Permission denied

Not much to explain here. The user you use with the share does not seem to have write permissions to that path. Maybe check the ACLs on the NAS?

 

[denisb88]

Thank you. However, Proxmox has successfully created the dump template snippets private images folders and I can see the progress of the zst file on my NAS.

 

[denisb88]

My config on NAS
What is wrong ???

 

[denisb88]

and my config in proxmox with backup

 

[Impact]

Sorry but I can't read most of that.