Fix has been included here: https://git.qemu.org/?p=qemu.git;a=commitdiff;h=197bfa7da7c8eeb39aa5
** Changed in: qemu Status: New => Fix Released -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1832914 Title: Wrong error log when drive is specified qcow but qcow2 image file used. Status in QEMU: Fix Released Bug description: On archlinux qemu version 4.0.0 when I type: $ qemu-system-x86_64 -drive format=qcow,file=image.qcow2 ... I get this output in stderr qemu-system-x86_64 -drive format=qcow,file=image.qcow2 ...: Unsupported qcow version 3 image.qcow2 is a qcow2 image created by qemu-img. error states that problem is with lack support with qcow3 format but real problem is that foramt=qcow is wrong option. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1832914/+subscriptions