You can make the backup normally, but test with command proxmox-backup-client.
file restore error, failed: all mounts failed or no supported file system (400)
- Thread starter akihiro hamada
- Start date
We have the same issue with all our Windows 11 Pro VMs.
The Windows 10 Pro VMs are still working.
The Windows 10 Pro VMs are still working.
We've managed to fix our error with the Windows 11 Pro VMs. The solution was mentioned in this post with the pre-encryption of Windows 11:
We didn't had the problem with upgraded Windows 10 to Windows 11 VMs and after disabling the encryption and taking a backup, everything worked fine with the file restore.
Hi all, in case you're still getting this issue - it's because of Windows Bitlocker pre-encryption.
Even when you're not consciously using Bitlocker the OS will pre-encrypt part of the drive, which stops Proxmox from reading it. Do the following to fix it:
From an admin command prompt in Windows, run:
(replace c: with whichever drive you're concerned with).
The drive will start to decrypt. You can check ongoing status with:
You'll see the status like this:
Once decryption is complete, run a backup in Proxmox of the VM...
Even when you're not consciously using Bitlocker the OS will pre-encrypt part of the drive, which stops Proxmox from reading it. Do the following to fix it:
From an admin command prompt in Windows, run:
manage-bde -off c:(replace c: with whichever drive you're concerned with).
The drive will start to decrypt. You can check ongoing status with:
manage-bde -status c:You'll see the status like this:
Once decryption is complete, run a backup in Proxmox of the VM...
We didn't had the problem with upgraded Windows 10 to Windows 11 VMs and after disabling the encryption and taking a backup, everything worked fine with the file restore.
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