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QCOW File - What is a .qcow file and how do I open it?

Learn about .QCOW files and view a list of programs that open them.

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What is a QCOW file? Disk image file saved in the QEMU Copy On Write (QCOW) format, a format used by QEMU virtualization software; stores the contents of a virtual machine's hard drive; supports zlib compression and AES encryption of separate, independent clusters.

More Information QEMU differs from other virtualization policies that allocate fixed amounts of disk space, in which some of the empty space may go unused. QEMU's strategy delays allocation of storage until the disk space is needed, which allows for smaller file sizes. NOTE: The QCOW format has been replaced by the QCOW2 format, which uses the .QCOW2 file extension.

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.QCOW File Extension

QEMU Copy On Write Disk Image

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What is a QCOW file?

Disk image file saved in the QEMU Copy On Write (QCOW) format, a format used by QEMU virtualization software; stores the contents of a virtual machine's hard drive; supports zlib compression and AES encryption of separate, independent clusters.

More Information

QEMU differs from other virtualization policies that allocate fixed amounts of disk space, in which some of the empty space may go unused. QEMU's strategy delays allocation of storage until the disk space is needed, which allows for smaller file sizes.

NOTE: The QCOW format has been replaced by the QCOW2 format, which uses the .QCOW2 file extension.

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Programs that open QCOW files

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Category: Disk Image Files

Updated: March 14, 2014

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What is a QCOW file?↓
Disk image file saved in the QEMU Copy On Write (QCOW) format, a format used by QEMU virtualization software; stores the contents of a virtual machine's hard drive; supports zlib compression and AES encryption of separate, independent clusters.

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