Backup Faild

[Giovanne]

Hello ,

In my PBS we have a VM who Faild in backup , the logs in below

NFO: Starting Backup of VM xxxx (qemu)
INFO: Backup started at 2023-02-22 04:08:49
INFO: status = running
INFO: VM Name: XXXXXXX
INFO: include disk 'sata0' 'Ceph_HDD:vm-3184-disk-0' 128G
INFO: include disk 'sata1' 'Ceph_HDD:vm-3184-disk-1' 128G
INFO: backup mode: snapshot
INFO: ionice priority: 7
INFO: creating Proxmox Backup Server archive 'vm/XXXX/2023-02-22T07:08:49Z'
INFO: started backup task 'f827a556-9b0b-4afa-b6ef-2a52eaca4d31'
INFO: resuming VM again
INFO: sata0: dirty-bitmap status: existing bitmap was invalid and has been cleared
INFO: sata1: dirty-bitmap status: existing bitmap was invalid and has been cleared
INFO:   0% (456.0 MiB of 256.0 GiB) in 3s, read: 152.0 MiB/s, write: 113.3 MiB/s
INFO:   1% (2.6 GiB of 256.0 GiB) in 24s, read: 105.1 MiB/s, write: 98.5 MiB/s
INFO:   2% (5.2 GiB of 256.0 GiB) in 47s, read: 115.0 MiB/s, write: 109.2 MiB/s
INFO:   3% (7.7 GiB of 256.0 GiB) in 1m 11s, read: 107.5 MiB/s, write: 102.0 MiB/s
INFO:   4% (10.3 GiB of 256.0 GiB) in 1m 37s, read: 101.1 MiB/s, write: 98.5 MiB/s
INFO:   4% (10.4 GiB of 256.0 GiB) in 1m 39s, read: 80.0 MiB/s, write: 80.0 MiB/s
ERROR: backup write data failed: command error: write_data upload error: pipelined request failed: detected chunk with wrong digest.
INFO: aborting backup job
INFO: resuming VM again
ERROR: Backup of VM XXXX failed - backup write data failed: command error: write_data upload error: pipelined request failed: detected chunk with wrong digest.

I saw in /mnt/datastore/PBS/.chunks/ , there is some chunk files like this:

8126df59eb22b8e099f2775ef821b29c1e00811d86764423a5b13956933b41d6.0.bad

Also verify backup, i got error in logs , chunk was marked as corrupted only in this VM.

is there a reason to this happen ? what log files or informations can i post to help ?


Best regards,

 

[Moayad]

Hi,

Can you please try to use "proxmox-backup-debug recover index" [0] tool on one of your backups? In order to recover the chunk, e.g:

proxmox-backup-debug recover index <file> <chunks>

is there a reason to this happen ? what log files or informations can i post to help ?

Did you stop the backup process of this VM during the backup job?

[0] https://pbs.proxmox.com/docs/proxmox-backup-debug/synopsis.html