Hi,
after setting up my NAS again, I have an issue with backing up my LXCs to an NFS share. This setup used to work for both VMs and LXCs in the past, now only for VMs.
The NFS share is set up with write access (which works – VM backups succeed), and I’m using the
When I try to back up an LXC, I get an error saying that rsync cannot chown the temp files. If I let the backup process continue, I end up with a temp folder containing all the files, but they aren’t packaged into a tar archive as expected.
I’d appreciate any help or suggestions
after setting up my NAS again, I have an issue with backing up my LXCs to an NFS share. This setup used to work for both VMs and LXCs in the past, now only for VMs.
The NFS share is set up with write access (which works – VM backups succeed), and I’m using the
all_squash
option as well as fixed anonuid
/anongid
, since it’s a local share just for me and I wanted to keep things simple.When I try to back up an LXC, I get an error saying that rsync cannot chown the temp files. If I let the backup process continue, I end up with a temp folder containing all the files, but they aren’t packaged into a tar archive as expected.
I’d appreciate any help or suggestions

Code:
INFO: starting new backup job: vzdump 112 --notes-template '{{guestname}}' --notification-mode auto --compress zstd --node pve --mode suspend --remove 0 --storage OpenMediaVault
INFO: Starting Backup of VM 112 (lxc)
INFO: Backup started at 2025-08-03 20:50:38
INFO: status = running
INFO: backup mode: suspend
INFO: ionice priority: 7
INFO: CT Name: Wireguard
INFO: including mount point rootfs ('/') in backup
INFO: temporary directory is on NFS, disabling xattr and acl support, consider configuring a local tmpdir via /etc/vzdump.conf
INFO: starting first sync /proc/2175/root/ to /mnt/pve/OpenMediaVault/dump/vzdump-lxc-112-2025_08_03-20_50_38.tmp
ERROR: rsync: [generator] chown "/mnt/pve/OpenMediaVault/dump/vzdump-lxc-112-2025_08_03-20_50_38.tmp/." failed: Operation not permitted (1)
ERROR: rsync: [generator] chown "/mnt/pve/OpenMediaVault/dump/vzdump-lxc-112-2025_08_03-20_50_38.tmp/bin" failed: Operation not permitted (1)
ERROR: rsync: [generator] chown "/mnt/pve/OpenMediaVault/dump/vzdump-lxc-112-2025_08_03-20_50_38.tmp/bin/arch" failed: Operation not permitted (1)
ERROR: rsync: [generator] chown "/mnt/pve/OpenMediaVault/dump/vzdump-lxc-112-2025_08_03-20_50_38.tmp/bin/ash" failed: Operation not permitted (1)
ERROR: rsync: [generator] chown "/mnt/pve/OpenMediaVault/dump/vzdump-lxc-112-2025_08_03-20_50_38.tmp/bin/base64" failed: Operation not permitted (1)
ERROR: rsync: [generator] chown "/mnt/pve/OpenMediaVault/dump/vzdump-lxc-112-2025_08_03-20_50_38.tmp/bin/bbconfig" failed: Operation not permitted (1)
ERROR: rsync: [generator] chown "/mnt/pve/OpenMediaVault/dump/vzdump-lxc-112-2025_08_03-20_50_38.tmp/bin/cat" failed: Operation not permitted (1)
ERROR: rsync: [generator] chown "/mnt/pve/OpenMediaVault/dump/vzdump-lxc-112-2025_08_03-20_50_38.tmp/bin/chattr" failed: Operation not permitted (1)
ERROR: rsync: [generator] chown "/mnt/pve/OpenMediaVault/dump/vzdump-lxc-112-2025_08_03-20_50_38.tmp/bin/chgrp" failed: Operation not permitted (1)
ERROR: rsync: [generator] chown "/mnt/pve/OpenMediaVault/dump/vzdump-lxc-112-2025_08_03-20_50_38.tmp/bin/chmod" failed: Operation not permitted (1)
ERROR: rsync: [generator] chown "/mnt/pve/OpenMediaVault/dump/vzdump-lxc-112-2025_08_03-20_50_38.tmp/bin/chown" failed: Operation not permitted (1)
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