i have a converted img file

format i think are raw

it are converted from qcow2

are it possible to convert it back to qcow2?

i tryed with

qemu-img convert -O qcow2 w.img w.qcow2

w.img are 75 gb

fdisk w.img -l shows correct size

but fdisk -l w.qcow2 shows totaly wrong!

0 mb