Qemu-img

External

• RHEL7 Virtualization Administration - Using qemu-img

Internal

• Linux Virtualization Configuration
• Linux Virtualization Operations

Overview

qemu-img is a command-line tool used to create, format, convert, modify and verify virtual machine images offline. It can handle all image formats supported by QEMU.

qemu-img must not be used to modify images in use by a running virtual machine or any other process - this may destroy the image. If an image is queried while it is modified by another process may result in an inconsistent state.

Sub-Commands

info

qemu info <filename>

qemu-img  info /main-storage-pool/testvm-01.img

image: /main-storage-pool/testvm-01.img
file format: qcow2
virtual size: 4.0G (4294967296 bytes)
disk size: 1.3G
cluster_size: 65536
Format specific information:
    compat: 1.1
    lazy refcounts: true

check

Performs a consistency check of the virtual machine image file, if the format is "qcow2", "qed" or "vdi". The command output can be in either "human" or "json" format.

qemu-img check <filename>