I am running UrBackup Server 2.5.35 on a machine with BTRFS storage. Recently, the “RAW” image format option seems to have disappeared or stopped working, and backup jobs automatically switched to VHD. Since I back up volumes larger than 5TB, VHD backups failed. After manually switching to VHDX, the backups are running again.
However, I have run into a critical issue with restores/mounting:
Web Interface: When I try to mount a VHDX image via the Web UI, it fails with: “Mounting image failed. Please see server log file for details.” Interestingly, the server logs (urbackup.log) do not show any specific errors related to the mount failure.
CLI Access: Previously, with RAW incremental images, I could mount them manually via the console. Now, with VHDX incrementals, every mounting attempt (even using loop devices) fails. The OS reports that no file system is found on the device, or the partition table is unreadable.
Environment & Setup:
UrBackup Server Version: 2.5.35
Backend Filesystem: BTRFS
Image Format: VHDX (Incremental)
How can I correctly mount these incremental VHDX images via the CLI when the Web UI fails?