Qcow

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The correct title of this article is qcow. The initial letter is shown capitalized due to technical restrictions.

qcow is a type of disk image that can be used with the QEMU emulator, the other types being vvfat, vpc, bochs, dmg, cloop, vmdk, cow, and raw, depending on the OS. The qcow image grows as data is added, and supports AES encryption and transparent decompression.

According to the QEMU FAQ, which points to DmUserspace, qcow can be mounted in Linux.

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Explanation of the format