Windows server backup only taking 4 Mb of Backup

[DanielRouleau]

Good day

I have a Proxmox VE Cluster v. 8.4.1

I have 1 particular VM that on 4 mbps of data is backup
there is no error it's like if the backup agent is does not see the disk
VM hardware:
Machine type is pc-q35-8.1
SCSI controler VirtIO SCSI Single
Hard drive CEPH disk 150 GB

QEMU Guest agent is enable but I don't think it's currently running (I don't have acces to the actual machine) because in the summary I don't se the IP's

Backup does not make any error but when I look at the backup size it is always 4.74 MB and if I go into file restore there is only 2 files
drive-efidisk0.mg.fidx 528 KB
drive-tpmstate0-backup.img.fidx 4 MB

Do you have any idear how I could fix this so that backup works properly and take the whole drive

thank you

Daniel
Note I have other Windows VM in the same cluster and there backup is working fine and report proper size backup

 

[DanielRouleau]

Also I did upgrade Proxmox backup server to 3.4.3 just to make sure I got this covered as well

 

[SteveITS]

On the actual disk is the Backup checkbox checked?

 

[DanielRouleau]

wow idiot me... thank you for that i don't know why it was uncheck, I will test it out thanks again I will check all my other machine make sure I don't have this issue elsewhere

 

[SteveITS]

It should be checked by default so may be a misclick.

 

[DanielRouleau]

I confirm it works a lot better with check box... thanks again I will flag this as solve