I have a Windows 2016 Server VM running on Proxmox VE 6.2-12 which was backed up to PBS successfully using "snaphot" mode. No errors during original backup or incremental backups. PBS is running on a dedicated server and the datastore in a directory on a hardware RAID volume (not ZFS). All backups for this VM verify successfully. A test restore completes successfully, however when booting the VM I see the blue Windows logo and the spinning dots, but then all I get is a black screen. I've tried all usual repair (disk repair, sfc /scannow, rebuilding BCD, MBR, etc.) but I'm not able to get the VM to work by any means other than reinstalling Windows.
The VM was stopped and started after the last qemu-server update and that didn't make a difference.
On Proxmox VE, the following proxmox-backup-client versions have been used to back up this VM:
0.8.21-1
0.9.0-2
0.9.1-1
On PBS, the following proxmox-backup-server versions have been used to back up this VM:
0.8.16-1
0.9.0-2
0.9.1-1
No combination of client or backup versions creates a backup that I can restore and run successfully.
I did a vzdump backup in snapshot mode to an NFS volume. I was able to restore that backup and run it successfully without any problems.
I tried backing up to PBS using a separate, new datastore but had the same "black screen" boot failure.
There seems to be a difference in how this VM is being back up to PBS vs vzdump to an NFS share.
Proxmox VE server:
PBS server:
There appears to be a problem with PBS making either a corrupt backup or a corrupt restore. The VM fails to boot properly from a PBS backup/restore but boots and runs properly from a vzdump to NFS backup and restore. Let me know if there are specific troubleshooting steps or information that I can provide to help figure out this PBS backup bug.
The VM was stopped and started after the last qemu-server update and that didn't make a difference.
On Proxmox VE, the following proxmox-backup-client versions have been used to back up this VM:
0.8.21-1
0.9.0-2
0.9.1-1
On PBS, the following proxmox-backup-server versions have been used to back up this VM:
0.8.16-1
0.9.0-2
0.9.1-1
No combination of client or backup versions creates a backup that I can restore and run successfully.
I did a vzdump backup in snapshot mode to an NFS volume. I was able to restore that backup and run it successfully without any problems.
I tried backing up to PBS using a separate, new datastore but had the same "black screen" boot failure.
There seems to be a difference in how this VM is being back up to PBS vs vzdump to an NFS share.
Proxmox VE server:
Code:
proxmox-ve: 6.2-2 (running kernel: 5.4.65-1-pve)
pve-manager: 6.2-12 (running version: 6.2-12/b287dd27)
pve-kernel-5.4: 6.2-7
pve-kernel-helper: 6.2-7
pve-kernel-5.4.65-1-pve: 5.4.65-1
pve-kernel-5.4.60-1-pve: 5.4.60-2
pve-kernel-5.4.34-1-pve: 5.4.34-2
ceph: 14.2.11-pve1
ceph-fuse: 14.2.11-pve1
corosync: 3.0.4-pve1
criu: 3.11-3
glusterfs-client: 5.5-3
ifupdown: not correctly installed
ifupdown2: 3.0.0-1+pve3
ksm-control-daemon: 1.3-1
libjs-extjs: 6.0.1-10
libknet1: 1.16-pve1
libproxmox-acme-perl: 1.0.5
libpve-access-control: 6.1-3
libpve-apiclient-perl: 3.0-3
libpve-common-perl: 6.2-2
libpve-guest-common-perl: 3.1-3
libpve-http-server-perl: 3.0-6
libpve-storage-perl: 6.2-9
libqb0: 1.0.5-1
libspice-server1: 0.14.2-4~pve6+1
lvm2: 2.03.02-pve4
lxc-pve: 4.0.3-1
lxcfs: 4.0.3-pve3
novnc-pve: 1.1.0-1
proxmox-backup-client: 0.9.1-1
proxmox-mini-journalreader: 1.1-1
proxmox-widget-toolkit: 2.3-1
pve-cluster: 6.2-1
pve-container: 3.2-2
pve-docs: 6.2-6
pve-edk2-firmware: 2.20200531-1
pve-firewall: 4.1-3
pve-firmware: 3.1-3
pve-ha-manager: 3.1-1
pve-i18n: 2.2-1
pve-qemu-kvm: 5.1.0-3
pve-xtermjs: 4.7.0-2
qemu-server: 6.2-15
smartmontools: 7.1-pve2
spiceterm: 3.1-1
vncterm: 1.6-2
zfsutils-linux: 0.8.4-pve2PBS server:
Code:
proxmox backup server: 0.9-1 (running kernel: 5.4.65-1-pve)
proxmox-backup: 1.0-4
proxmox-backup-client: 0.9.1-1
proxmox-backup-server: 0.9.1-1
proxmox-widget-toolkit: 2.3-2There appears to be a problem with PBS making either a corrupt backup or a corrupt restore. The VM fails to boot properly from a PBS backup/restore but boots and runs properly from a vzdump to NFS backup and restore. Let me know if there are specific troubleshooting steps or information that I can provide to help figure out this PBS backup bug.
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