Igor
Backups to Umma
Backups go to SMB mount at /mnt/pve/umma on Igor.
Looks like compression is not on the fly but it first dumps data uncompressed and then runs compression which fails on SMB mount... https://community.nethserver.org/t/proxmox-help-needed-proxmox-backup-ends-with-broken-pipe/18537/2
Can set where the "temp" file is created so it goes to local drive first:
/etc/vzdump.conf
tmpdir: /var/lib/vz/dump/temp
This is not true for VM backups... I see files with .dat created during backup where size matches compressed size and "tmpdir" is not used much.