bug about provoked BACKUP FELL BACK TO A FULL due to DR job

Pilow

I can confirm with the dates of the backup logs that it is since the exact date of beginning of DR job that this problem appears on the two other jobs.

when not doing NBD+CBT, the backup & replica jobs keep the "full" snapshot on the VM.
DR do not do that, it delete the snapshot.

I guess this is a silent failure of the way DR manages its snapshot deletion that could delete the CBT bitmap ? and then, baaam fall back to full on other jobs relying on said bitmap... ?

this is a run of the DR job

no notion of NBD/CBT in DR job advanced parameters, it treats that differently

florent

I am summoning @storage (especially G. R. )

Pilow

@florent still have the issue
did @storage finally spawned after your summoning ?

olivierlambert

Reping @Team-Storage

Goulven

Hello , we are on it actually , i'm trying to reproduce issue on my side

LoTus111

@Goulven Looks like we have the same Issue
Any Progress or updates on this topic?

Goulven

@LoTus111 Hello, I attempted to reproduce the issue without success. Could you please share the logs with us so we can conduct a deeper investigation? Feel free to send them to me via PM.

acebmxer

I have two few vms doing this on 1 pool.

Logs from the last 3 runs.
2026-02-18T03_00_00.018Z - backup NG.txt
2026-02-18T04_21_30.814Z - backup NG.txt
2026-02-18T12_01_21.452Z - backup NG.txt

LoTus111

I have ticket open at Vates for this Issue, but no feedback as for now

florent

@LoTus111 the investigation is ongoing , no success for now

acebmxer

@florent do the logs i provided help at all? or Idea why i am see this issue as well? I do not have a DR job just Delta backup and mirror backup.