Choosing the Compression Mode

Before starting Parallels Compressor, perform the following steps:

  1. Back up your virtual machine by cloning it or by copying its hard disk files to a safe location.

    This will allow you to restore your virtual machine in case you do not like the results of the compression.

    Warning: The result of virtual machine compression is irreversible.

  2. Check the hard disk for errors by running the chkdsk.exe utility.

Check the virtual machine whose hard disk you are going to compress meets the following requirements:

Other types of virtual hard disks can be successfully compressed with Parallels Compressor.

Compression Levels

Parallels Compressor is a special utility that helps you keep your virtual machine compact and efficient. It cleans up the unused space on the virtual hard disk, thus reducing the size of your virtual hard disk file (.hdd) stored on the physical computer.

Parallels Compressor can run in one of these modes:

By default, Parallels Compressor runs in the Express mode.

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