Backup failed - No space left on device

tukane

New Member
May 16, 2024
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Hi all,

since a few days my backup job is failing.

Code:
ERROR: rsync: [receiver] write failed on "/var/tmp/vzdumptmp2094692_102/var/lib/docker/containers/8bb2ef4ed71fc6d6e114de76491a145d917d3369c422f4f97d549d52aac22057/8bb2ef4ed71fc6d6e114de76491a145d917d3369c422f4f97d549d52aac22057-json.log": No space left on device (28)
ERROR: rsync error: error in file IO (code 11) at receiver.c(381) [receiver=3.2.7]
ERROR: rsync: [sender] write error: Broken pipe (32)

The backups should be stored on my NAS.
From the error message above I assume that the backup file is stored in a temp directory and copied from there to the NAS, right?

I'm running 1 container (64G) and 1 VM (64G). Proxmox is running on a 256G SSD, so when my assumption with the tmp-file is right, the disk size is not sufficient.

Code:
root@proxmox:/usr# df -h
Filesystem                     Size  Used Avail Use% Mounted on
udev                           7.8G     0  7.8G   0% /dev
tmpfs                          1.6G  2.2M  1.6G   1% /run
/dev/mapper/pve-root            67G  9.6G   54G  16% /
tmpfs                          7.8G   40M  7.8G   1% /dev/shm
tmpfs                          5.0M     0  5.0M   0% /run/lock
/dev/sda2                     1022M   12M 1011M   2% /boot/efi
//192.168.0.10/Backup/proxmox   14T  9.9T  4.1T  71% /mnt/pve/NAS
//192.168.0.10/paperless        14T  9.9T  4.1T  71% /mnt/lxc_shares/paperless
tmpfs                          1.6G     0  1.6G   0% /run/user/0
/dev/fuse                      128M   20K  128M   1% /etc/pve

I've another HDD (sdb) in my proxmox server which has more capacity.
Bildschirmfoto 2025-06-26 um 18.22.58.png

On this HDD is the volume of the container stored.
Bildschirmfoto 2025-06-26 um 18.25.05.png

Is there a way to use this HDD for the tmp-files of the backups? If yes, what do I have to consider? Do I need another partition? What about the CT Volume?

Thanks
tukane
 
Last edited:
Is there a way to use this HDD for the tmp-files of the backups? If yes, what do I have to consider? Do I need another partition?
Create a directory storage on that sdb drive & then set a tmpdir for vzdump on that location path.
I see you have LVM on that drive already. So AFAIK you will need to create a new LV to be able to accomplish this.

See my post here which references the docs on this. With a NAS as the target, you should probably anyway have had this.