Last two rounds of the VM image backup have resulted in an error, backup of the image is successful I can restore the image or extract a single file from the VM. The error message is
using fast incremental mode (dirty-bitmap), 3.0 GiB dirty of 160.0 GiB total
100: 2025-12-14 01:00:11 INFO: 8% (260.0 MiB of 3.0 GiB) in 3s, read: 86.7 MiB/s, write: 85.3 MiB/s
100: 2025-12-14 01:00:14 INFO: 18% (564.0 MiB of 3.0 GiB) in 6s, read: 101.3 MiB/s, write: 98.7 MiB/s
100: 2025-12-14 01:00:17 INFO: 26% (804.0 MiB of 3.0 GiB) in 9s, read: 80.0 MiB/s, write: 74.7 MiB/s
100: 2025-12-14 01:00:20 INFO: 32% (1004.0 MiB of 3.0 GiB) in 12s, read: 66.7 MiB/s, write: 65.3 MiB/s
100: 2025-12-14 01:00:23 INFO: 37% (1.1 GiB of 3.0 GiB) in 15s, read: 54.7 MiB/s, write: 53.3 MiB/s
100: 2025-12-14 01:00:26 INFO: 45% (1.4 GiB of 3.0 GiB) in 18s, read: 74.7 MiB/s, write: 62.7 MiB/s
100: 2025-12-14 01:00:29 INFO: 52% (1.6 GiB of 3.0 GiB) in 21s, read: 74.7 MiB/s, write: 64.0 MiB/s
100: 2025-12-14 01:00:32 INFO: 60% (1.8 GiB of 3.0 GiB) in 24s, read: 80.0 MiB/s, write: 69.3 MiB/s
100: 2025-12-14 01:00:35 INFO: 66% (2.0 GiB of 3.0 GiB) in 27s, read: 65.3 MiB/s, write: 60.0 MiB/s
100: 2025-12-14 01:00:38 INFO: 74% (2.2 GiB of 3.0 GiB) in 30s, read: 76.0 MiB/s, write: 56.0 MiB/s
100: 2025-12-14 01:00:41 INFO: 81% (2.5 GiB of 3.0 GiB) in 33s, read: 81.3 MiB/s, write: 46.7 MiB/s
100: 2025-12-14 01:00:44 INFO: 89% (2.7 GiB of 3.0 GiB) in 36s, read: 73.3 MiB/s, write: 61.3 MiB/s
100: 2025-12-14 01:00:47 INFO: 96% (2.9 GiB of 3.0 GiB) in 39s, read: 73.3 MiB/s, write: 50.7 MiB/s
100: 2025-12-14 01:00:49 INFO: 100% (3.0 GiB of 3.0 GiB) in 41s, read: 58.0 MiB/s, write: 32.0 MiB/s
100: 2025-12-14 01:00:49 ERROR: backup finish failed: command error: stream closed because of a broken pipe
100: 2025-12-14 01:00:49 INFO: aborting backup job
100: 2025-12-14 01:00:49 INFO: resuming VM again
100: 2025-12-14 01:00:49 ERROR: Backup of VM 100 failed - backup finish failed: command error: stream closed because of a broken pipe.
All VM backup jobs generate the same error message but it is a usable backup. Searching for resolution to this found several possible causes, disk space, firewall, or permission issue. I believe it is disk space issue, one solution was to verify disk space where the image is being compressed and should be listed in /etc/vzdump.conf but this file has no such listing. Thoughts on if I'm looking for the right reason, unable to compress the backup and what disk is being used, or am I completely wrong?
Thanks
using fast incremental mode (dirty-bitmap), 3.0 GiB dirty of 160.0 GiB total
100: 2025-12-14 01:00:11 INFO: 8% (260.0 MiB of 3.0 GiB) in 3s, read: 86.7 MiB/s, write: 85.3 MiB/s
100: 2025-12-14 01:00:14 INFO: 18% (564.0 MiB of 3.0 GiB) in 6s, read: 101.3 MiB/s, write: 98.7 MiB/s
100: 2025-12-14 01:00:17 INFO: 26% (804.0 MiB of 3.0 GiB) in 9s, read: 80.0 MiB/s, write: 74.7 MiB/s
100: 2025-12-14 01:00:20 INFO: 32% (1004.0 MiB of 3.0 GiB) in 12s, read: 66.7 MiB/s, write: 65.3 MiB/s
100: 2025-12-14 01:00:23 INFO: 37% (1.1 GiB of 3.0 GiB) in 15s, read: 54.7 MiB/s, write: 53.3 MiB/s
100: 2025-12-14 01:00:26 INFO: 45% (1.4 GiB of 3.0 GiB) in 18s, read: 74.7 MiB/s, write: 62.7 MiB/s
100: 2025-12-14 01:00:29 INFO: 52% (1.6 GiB of 3.0 GiB) in 21s, read: 74.7 MiB/s, write: 64.0 MiB/s
100: 2025-12-14 01:00:32 INFO: 60% (1.8 GiB of 3.0 GiB) in 24s, read: 80.0 MiB/s, write: 69.3 MiB/s
100: 2025-12-14 01:00:35 INFO: 66% (2.0 GiB of 3.0 GiB) in 27s, read: 65.3 MiB/s, write: 60.0 MiB/s
100: 2025-12-14 01:00:38 INFO: 74% (2.2 GiB of 3.0 GiB) in 30s, read: 76.0 MiB/s, write: 56.0 MiB/s
100: 2025-12-14 01:00:41 INFO: 81% (2.5 GiB of 3.0 GiB) in 33s, read: 81.3 MiB/s, write: 46.7 MiB/s
100: 2025-12-14 01:00:44 INFO: 89% (2.7 GiB of 3.0 GiB) in 36s, read: 73.3 MiB/s, write: 61.3 MiB/s
100: 2025-12-14 01:00:47 INFO: 96% (2.9 GiB of 3.0 GiB) in 39s, read: 73.3 MiB/s, write: 50.7 MiB/s
100: 2025-12-14 01:00:49 INFO: 100% (3.0 GiB of 3.0 GiB) in 41s, read: 58.0 MiB/s, write: 32.0 MiB/s
100: 2025-12-14 01:00:49 ERROR: backup finish failed: command error: stream closed because of a broken pipe
100: 2025-12-14 01:00:49 INFO: aborting backup job
100: 2025-12-14 01:00:49 INFO: resuming VM again
100: 2025-12-14 01:00:49 ERROR: Backup of VM 100 failed - backup finish failed: command error: stream closed because of a broken pipe.
All VM backup jobs generate the same error message but it is a usable backup. Searching for resolution to this found several possible causes, disk space, firewall, or permission issue. I believe it is disk space issue, one solution was to verify disk space where the image is being compressed and should be listed in /etc/vzdump.conf but this file has no such listing. Thoughts on if I'm looking for the right reason, unable to compress the backup and what disk is being used, or am I completely wrong?
Thanks