Welcome to the Linux Foundation Forum!

Correct answer for Quiz-Question 28.4 has flipped arguments

a1300 Posts: 3


in Question 28.04 has the correct answer C. its arguments wrongfully flipped. Currently the answer is like in the first line. But it should be like the second line:

- qemu-img convert -O qcow2 myvm.qcow2 myvm.vmdk
+ qemu-img convert -O qcow2 myvm.vmdk myvm.qcow2

I verified this by reproducing an example on Ubuntu 22.04

# install dependencies
sudo apt-get update
sudo DEBIAN_FRONTEND=noninteractive apt-get upgrade -y
sudo DEBIAN_FRONTEND=noninteractive apt-get install --yes qemu-kvm virt-manager virt-viewer libguestfs-tools genisoimage

# create a qcow2 formatted image
qemu-img create -o preallocation=full -f qcow2 first 5G

# show information about newly created disk
qemu-img info first
image: first
file format: qcow2
virtual size: 5 GiB (5368709120 bytes)
disk size: 5 GiB
cluster_size: 65536
Format specific information:
    compat: 1.1
    compression type: zlib
    lazy refcounts: false
    refcount bits: 16
    corrupt: false
    extended l2: false

# now convert first (qcow2) image to raw format
qemu-img convert -O raw first first.raw

# now check the version of the newly created .raw image
qemu-img info first.raw
image: first.raw
file format: raw
virtual size: 5 GiB (5368709120 bytes)
disk size: 4 KiB

lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 22.04 LTS
Release:        22.04
Codename:       jammy

qemu-img --version
qemu-img version 6.2.0 (Debian 1:6.2+dfsg-2ubuntu6.2)
Copyright (c) 2003-2021 Fabrice Bellard and the QEMU Project developers


  • coop
    coop Posts: 915

    Yes you are correct, this will be fixed. thanks.

  • fcioanca
    fcioanca Posts: 1,930

    This has been corrected. Thank you!


Upcoming Training