Trying to backup to manually mounted NFSdir


Well-Known Member
Sep 1, 2015
near Frankfurt
I'm starting to prepare for a migration and as part of that process I wanted to dump the VM's & LXC's to a FreeNAS hosted NFS mount.

vzdump 104 –-dumpdir /mnt/nas1 –-mode snapshot
400 Parameter verification failed.
vmid: invalid format - value does not look like a valid VM ID​

My Versions are as follows:
proxmox-ve: 5.4-1 (running kernel: 4.15.18-16-pve)
pve-manager: 5.4-7 (running version: 5.4-7/fc10404a)
pve-kernel-4.15: 5.4-4
pve-kernel-4.15.18-16-pve: 4.15.18-41
corosync: 2.4.4-pve1
criu: 2.11.1-1~bpo90
glusterfs-client: 3.8.8-1
ksm-control-daemon: 1.2-2
libjs-extjs: 6.0.1-2
libpve-access-control: 5.1-10
libpve-apiclient-perl: 2.0-5
libpve-common-perl: 5.0-52
libpve-guest-common-perl: 2.0-20
libpve-http-server-perl: 2.0-13
libpve-storage-perl: 5.0-43
libqb0: 1.0.3-1~bpo9
lvm2: 2.02.168-pve6
lxc-pve: 3.1.0-3
lxcfs: 3.0.3-pve1
novnc-pve: 1.0.0-3
proxmox-widget-toolkit: 1.0-28
pve-cluster: 5.0-37
pve-container: 2.0-39
pve-docs: 5.4-2
pve-edk2-firmware: 1.20190312-1
pve-firewall: 3.0-22
pve-firmware: 2.0-6
pve-ha-manager: 2.0-9
pve-i18n: 1.1-4
pve-libspice-server1: 0.14.1-2
pve-qemu-kvm: 3.0.1-4
pve-xtermjs: 3.12.0-1
qemu-server: 5.0-53
smartmontools: 6.5+svn4324-1
spiceterm: 3.0-5
vncterm: 1.5-3
zfsutils-linux: 0.7.13-pve1~bpo2

I can't see an issue with my command from reading the docs

Hoping for a hint
Your command line contains strange hyphen characters - please use:

# vzdump 104 --dumpdir /mnt/nas1 --mode snapshot
Argghhh, damn copy & paste failure... THX!

But now it seems it can't create the copy of the config:

ERROR: Backup of VM 100 failed - unable to open file '/etc/pve/nodes/pve1/lxc/100.conf.tmp.48734' - Permission denied​

Hope you got a hint for that too...
Seems this one had to do with quora, as the other two nodes of the cluster were off...

That problem seems to be solved.

But I can't backup LXC straight to NFS, as reported here.


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