Comment 6 for bug 1846427

I haven't done any sort of "narrowing down", but recent QEMUs (built from the master branch, post-v4.1) have corrupted at least two VM disk images (qcow2) for me as well. I had to reinstall both VMs.

I didn't make any noise because I was sure that, if I wasn't seeing ghosts, then others must have encountered the symptom earlier than I did, and file bug reports with more details than I had time for.

Perhaps relevant: my use case lacks savevm/loadvm. I only boot and shutdown VMs.

My symptoms have been:
- qemu refusing to start, due to the qcow2 image being corrupt
- qemu-img reporting the image as corrupt
- applications in guests that checksum data reporting problems (such as RPM complaining about RPMDB corruption)

I think the affected qcow2 images may have had compressed clusters. (I no longer have the images.)