To easily and effectively repair your damaged VDI files use the SysInfo VDI Recovery. The tool provides a free demo version tool to evaluate the performance of the Tool, It supports all file systems where your VDI is saved, i.e. FAT, FAT16, FAT32, FAT64, NTFS, HFS+, and EXTX. It is widely compatible with recovery for dual disk types i.e., Fixed and Dynamic disks. Some other features of the tool are: 

• The tool repairs damaged Virtual disk image files and restore them.
• Swiftly restores erased or deleted files from the VM back to their native forms.
• VDI file repair tool is suitable with MBR and GPT partition tables.