Error backing up ChromeFlex VM

[joseoliveira]

Dear Proxmox Community,

Good morning.
I'm trying to backup a ChromeFlex VM but I'm getting the following error:

ERROR: vma_writer_register_stream: got strange size 0

Could you please help me?
Thank you.

 

[readyspace]

Hi, without more details from you, this error often arises with unstable I/O or storage paths (e.g. USB, remote mounts) and sometimes resolves by switching backup mode or retrying.

 

[joseoliveira]

Hi, thank you for your update.
I have tried to switch backup modes without success...
Could you please let me know which details do you need?

ChromeFlex VM details:

bios: ovmf
boot: order=scsi0
cores: 1
cpu: x86-64-v2-AES
efidisk0: datastore1:401/vm-401-disk-0.qcow2,efitype=4m,size=528K
ide2: none,media=cdrom
machine: q35
memory: 2048
meta: creation-qemu=9.0.2,ctime=1751971161
name: ChromeFlex01
net0: virtio=BC:24:117:E3:52,bridge=vmbr0,firewall=1
numa: 0
ostype: l26
scsi0: datastore1:401/vm-401-disk-1.qcow2,iothread=1,size=32G
scsi2: /dev/loop1,size=7308669440
scsihw: virtio-scsi-single
smbios1: uuid=82181f1e-d472-4327-b5ed-a0ea8629d327
sockets: 1
vga: virtio-gl
vmgenid: 5957f48e-d7ed-4d48-8c26-86caf4a9165f

I setup this VM following this guide: https://kevindavid.org/code/2024/03/20/chrome-os-flex-proxmox.html

Many thanks.

 

[joseoliveira]

Dear Community,

Backup is now running after removing scsi2...
Many thanks.