Home : File Types : QCOW File

.QCOW File Extension

File TypeQEMU Copy On Write Disk Image

4.1 (18 Votes)
CategoryDisk Image Files

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NOTE: The QCOW format has been replaced by the QCOW2 format, which uses the .QCOW2 file extension.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

Updated 3/14/2014

About QCOW Files

Our goal is to help you understand what a file with a *.qcow suffix is and how to open it.

The QEMU Copy On Write Disk Image file type, file format description, and Windows and Linux programs listed on this page have been individually researched and verified by the FileInfo team. We strive for 100% accuracy and only publish information about file formats that we have tested and validated.

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