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KVM Virtualization Cookbook by Konstantin Ivanov

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In this recipe, we listed the supported disk image formats by QEMU. The following is a brief description of the most common types that you might encounter:

  • raw: Raw disk image format. This is the default format and can be one of the fastest file-based formats. If you format this image with a filesystem that supports holes, for example, EXT3, then only sectors that have data will use space. The main drawback of the raw images is the lack of features, making them ideal for testing and quick prototyping.
  • qcow2: As we mentioned in the previous section, this is one of the most feature-rich formats. It supports VM snapshots, compression, and encryption for the price of slightly reduced performance.
  • qcow: This is an older QEMU image ...

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