I tried to make a quick grep of the start of the disk in the "bad" raw image and it does not exist anywhere so there is more ot it then just a offset issue.
rg -M 20 -a --encoding=ascii '\xeb\x63\x90\x00\x00\x00\x00\x00\x00\x00\x00\x00' coreos_production_openstack_image.bin.apfs or rg -M 20 -a --encoding=ascii 'GRUB \x00Geom\x00Hard Disk\x00Read\x00 Error' coreos_production_openstack_image.bin.apfs The actual data seams to start here: $ hexdump -C coreos_production_openstack_image.bin.apfs | head 00000000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 0cc4f000 48 8b 4c 24 58 48 89 4c 24 08 48 89 44 24 10 e8 |H.L$XH.L$.H.D$..| 0cc4f010 3c a5 c5 ff 48 8b 44 24 18 48 8b 4c 24 20 48 8d |<...H.D$.H.L$ H.| 0cc4f020 15 9b e9 3f 00 48 39 c2 75 22 48 8b 44 24 48 48 |...?.H9.u"H.D$HH| 0cc4f030 8b 00 48 89 44 24 10 48 89 0c 24 66 c7 44 24 08 |..H.D$.H..$f.D$.| 0cc4f040 00 00 e8 c9 00 00 00 e9 70 ff ff ff 48 89 04 24 |........p...H..$| 0cc4f050 48 89 54 24 08 48 8d 05 e4 cf 3e 00 48 89 44 24 |H.T$.H....>.H.D$| 0cc4f060 10 e8 1a f1 bb ff 0f 0b e8 a3 5a c0 ff e9 7e fe |..........Z...~.| 0cc4f070 ff ff cc cc cc cc cc cc cc cc cc cc cc cc cc cc |................| and ends here: 261bf040 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 21f600000 There are som small small zones of zeroes here and there also but not much. And the file size seams small and wrong. $ ls -lah coreos_production_openstack_image.bin.apfs $ du -hs coreos_production_openstack_image.bin.apfs 16M coreos_production_openstack_image.bin.apfs -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1738840 Title: qemu-img convert qcow2 to raw fails on OS X Status in QEMU: New Bug description: I try to convert a image from qcow2 to raw and the result is a not bootable image. I dont know if it is a bug in qemu-img convert or with the image it self. See this error report for better readability: https://github.com/coreos/bugs/issues/1121#issuecomment-351968518 As a reply here they use 2.9.0 version of $ qemu-img -V qemu-img version 2.11.0 Copyright (c) 2003-2017 Fabrice Bellard and the QEMU Project developers $ uname -v Darwin Kernel Version 17.2.0 $ mount ./ /dev/disk1s1 on / (apfs, local, journaled) $ wget https://beta.release.core- os.net/amd64-usr/current/coreos_production_openstack_image.img.bz2 $ date Fri Dec 14 17:15:57 CET 2017 $ bunzip2 coreos_production_openstack_image.img.bz2 $ cp -a coreos_production_openstack_image.img.org coreos_production_openstack_image.img $ shasum coreos_production_openstack_image.img.org ae2119c6f0390dc36f247f7016923ea85de5d8e6 coreos_production_openstack_image.img.org $ qemu-img convert -f qcow2 -O raw coreos_production_openstack_image.img.org coreos_production_openstack_image.bin $ qemu-system-x86_64 -m 256 -nographic -hda coreos_production_openstack_image.img -boot c SeaBIOS (version rel-1.11.0-0-g63451fca13-prebuilt.qemu-project.org) iPXE (http://ipxe.org) 00:03.0 C980 PCI2.10 PnP PMM+0FF915A0+0FEF15A0 C980 Booting from Hard Disk... GRUB loading.... Welcome to GRUB! .... $ qemu-system-x86_64 -m 256 -nographic -hda coreos_production_openstack_image.bin -boot c SeaBIOS (version rel-1.11.0-0-g63451fca13-prebuilt.qemu-project.org) iPXE (http://ipxe.org) 00:03.0 C980 PCI2.10 PnP PMM+0FF915A0+0FEF15A0 C980 Booting from Hard Disk... Boot failed: not a bootable disk .... $ head -c 8192 coreos_production_openstack_image.bin | hexdump -C 00000000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 00002000 $ qemu-img info coreos_production_openstack_image.bin image: coreos_production_openstack_image.bin file format: raw virtual size: 8.5G (9116319744 bytes) disk size: 217M $ qemu-img info coreos_production_openstack_image.img image: coreos_production_openstack_image.img file format: qcow2 virtual size: 8.5G (9116319744 bytes) disk size: 785M cluster_size: 65536 Format specific information: compat: 0.10 refcount bits: 16 The same version works on Ubuntu so it looks like its only the Mac version or the new APFS filesystem. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1738840/+subscriptions
