2017-05-12 16:32 GMT+03:00 Vasiliy Tolstov <v.tolstov@xxxxxxxxx>: > Also, specify compat in xml desc of new disk helps with comat version, > but image size grows: > image: new2.qcow2 Sorry for noise. I found root case - old.qcow2 have internal compression enabled when created qcow2 file, but on new image libvirt does not know about compression flag and not pass it to qemu-img binary. So qemu-img detect that original image have compression and new image does not have it and transparently decompress it. So this is "feature" of qemu-img and not bug in libvirt. -- Vasiliy Tolstov, e-mail: v.tolstov@xxxxxxxxx -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list