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[Qemu-devel] [Bug 1738840] Re: qemu-img convert qcow2 to raw fails on OS
From: |
Robert Marklund |
Subject: |
[Qemu-devel] [Bug 1738840] Re: qemu-img convert qcow2 to raw fails on OS X |
Date: |
Tue, 19 Dec 2017 15:03:26 -0000 |
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
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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.
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- [Qemu-devel] [Bug 1738840] [NEW] qemu-img convert qcow2 to raw fails on OS X, Robert Marklund, 2017/12/18
- [Qemu-devel] [Bug 1738840] Re: qemu-img convert qcow2 to raw fails on OS X, John Snow, 2017/12/18
- [Qemu-devel] [Bug 1738840] Re: qemu-img convert qcow2 to raw fails on OS X, Robert Marklund, 2017/12/19
- [Qemu-devel] [Bug 1738840] Re: qemu-img convert qcow2 to raw fails on OS X,
Robert Marklund <=
- [Qemu-devel] [Bug 1738840] Re: qemu-img convert qcow2 to raw fails on OS X, Robert Marklund, 2017/12/19
- [Qemu-devel] [Bug 1738840] Re: qemu-img convert qcow2 to raw fails on OS X, Robert Marklund, 2017/12/19
- [Qemu-devel] [Bug 1738840] Re: qemu-img convert qcow2 to raw fails on OS X, John Snow, 2017/12/21