If you have already tried merging the AVHD checkpoint and still cannot restore the data to the parent disk, there are a few other options you can try.
One option is to export the data from the AVHD file to a new virtual hard disk (VHD) file. You can do this using the Disk2VHD tool from Sysinternals. This tool allows you to create a VHD file from an existing disk, including an AVHD checkpoint.
To use Disk2VHD, follow these steps:
- Download and install the Disk2VHD tool from the Sysinternals website.
- Open Disk2VHD and select the AVHD file as the source disk.
- Choose a destination folder and filename for the new VHD file.
- Select the volumes you want to include in the VHD file. Make sure to select the Linux OS volume.
- Click "Create" to start the export process.
Once the export process is complete, you should have a new VHD file containing the data from the AVHD checkpoint. You can then attach the VHD to a new virtual machine and access the data.