Requirements for Source Disk
The modifying operations require that the source hard disk image should not be in use by a running virtual machine.
Checking Disk Format
When selecting a disk image to modify, make sure that you select the source hard disk image of a proper format.
To check the disk format do the following:
Using the Wizard to Modify an Existing Hard Disk Image
In the Hard Disk actions group, choose the operation you want to perform on the virtual hard disk.
There are four available operations for virtual disks images:
Choose the operation, then click Next.
For size increasing select the source hard disk image and the new size for the disk. Use the Browse button to locate a file. Use the spinner buttons next to the Image Size field to set the required value.
Note. Parallels Image Tool doesn't allow you to decrease image size.
For both hard disk conversion operations select a source disk specify a path and specify a name of the resulting converted image in the Destination field.
When defragmenting an expanding hard disk specify the name of a source hard disk image. Use the Browse button to locate the required file.
After specifying the input data click Next.
Carefully review the settings (operation, source image file, and destination file if present, etc.). If everything is correct, click the Start button to start the desired operation.
The new disk image is ready, and you can connect it to a virtual machine in the Configuration Editor. See Adding New Devices to Virtual Machine to learn how to connect a new hard disk image to a virtual machine, or Hard Disk Options to learn how to replace one of the currently connected hard disks with the new one.
Note that not all operating systems are able to recognize a newly added hard disk, use the guest operating system means to make a new device visible to the guest OS.