pve 3.x, one VM backup ERROR: backup_complete_cb -5, disk is iscsi, howto check/repair?

m.ardito

Active Member
Feb 17, 2010
1,473
16
38
Torino, Italy
Hi,

my 3.x cluster has since long had no problems, but last night I had two VM failing backup. I retried manually the first today, and it completed, but the other still fails.

When the night job (snapshot mode) failed for 2 VM (both windows server VM, all disks over iSCSI):
- the first (vmid 205) failed with
205: May 12 02:07:01 INFO: status: 67% (58248396800/85899345920), sparse 34% (29847646208), duration 2105, 4/0 MB/s
205: May 12 02:07:01 ERROR: backup_complete_cb -5
205: May 12 02:07:01 INFO: aborting backup job
205: May 12 02:08:27 ERROR: Backup of VM 205 failed - backup_complete_cb -5

- the second (vmid 206) with
206: May 12 03:20:43 ERROR: vma_writer_close: incomplete stream 'drive-virtio2' (68717707264 != 68719476736)
206: May 12 03:20:43 INFO: aborting backup job
206: May 12 03:20:45 ERROR: Backup of VM 206 failed - vma_writer_close: incomplete stream 'drive-virtio2' (68717707264 != 68719476736)

after those errors, the job completed successfully other 7 vm backup, with no apparent issues.

backup storage has plenty of space, this is not the cause.

Noticing the errors, today I retried manually (from the web gui) to backup vmid 205, and it worked, completed without errors.

then I retried manually (from the web gui) to backup vmid 206, but it keeps failing, now always with
INFO: status: 42% (10896801792/25786580992), sparse 3% (856358912), duration 629, 2/1 MB/s
ERROR: backup_complete_cb -5
INFO: aborting backup job
ERROR: Backup of VM 207 failed - backup_complete_cb -5
INFO: Backup job finished with errors

I guess qemu-img check can't help me in this case (iscsi disks), so what can I do to make this VM backup complete? what/where to check?

Marco
 

About

The Proxmox community has been around for many years and offers help and support for Proxmox VE, Proxmox Backup Server, and Proxmox Mail Gateway.
We think our community is one of the best thanks to people like you!

Get your subscription!

The Proxmox team works very hard to make sure you are running the best software and getting stable updates and security enhancements, as well as quick enterprise support. Tens of thousands of happy customers have a Proxmox subscription. Get yours easily in our online shop.

Buy now!