Can confirm this is still an issue with 4.1.0. ?field.comment=Can confirm this is still an issue with 4.1.0.
** Attachment added: "Files created on Windows and Debian" https://bugs.launchpad.net/qemu/+bug/1759522/+attachment/5300530/+files/vhdx_comparison.7z -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1759522 Title: windows qemu-img create vpc/vhdx error Status in QEMU: New Bug description: On windows, using qemu-img (version 2.11.90) to create vpc/vhdx virtual disk tends to fail. Here's the way to reproduce: 1. Install qemu-w64-setup-20180321.exe 2. Use `qemu-img create -f vhdx -o subformat=fixed disk.vhdx 512M` to create a vhdx: Formatting 'disk.vhdx', fmt=vhdx size=536870912 log_size=1048576 block_size=0 subformat=fixed 3. Execute `qemu-img info disk.vhdx` gives the result, (note the `disk size` is incorrect): image: disk.vhdx file format: vhdx virtual size: 512M (536870912 bytes) disk size: 1.4M cluster_size: 8388608 4. On Windows 10 (V1709), double click disk.vhdx gives an error: Make sure the file is in an NTFS volume and isn't in a compressed folder or volume. Using Disk Management -> Action -> Attach VHD gives an error: The requested operation could not be completed due to a virtual disk system limitation. Virtual hard disk files must be uncompressed and uneccrypted and must not be sparse. Comparison with Windows 10 created VHDX: 1. Using Disk Management -> Action -> Create VHD: File name: win.vhdx Virtual hard disk size: 512MB Virtual hard disk format: VHDX Virtual hard disk type: Fixed size 2. Detach VHDX 3. Execute `qemu-img info win.vhdx` gives the result: image: win.vhdx file format: vhdx virtual size: 512M (536870912 bytes) disk size: 516M cluster_size: 33554432 Comparison with qemu-img under Ubuntu: 1. Version: qemu-img version 2.5.0 (Debian 1:2.5+dfsg-5ubuntu10.16), Copyright (c) 2004-2008 Fabrice Bellard 2. qemu-img create -f vhdx -o subformat=fixed lin.vhdx 512M Formatting 'lin.vhdx', fmt=vhdx size=536870912 log_size=1048576 block_size=0 subformat=fixed 3. qemu-img info lin.vhdx image: lin.vhdx file format: vhdx virtual size: 512M (536870912 bytes) disk size: 520M cluster_size: 8388608 4. Load lin.vhdx under Windows 10 is ok The same thing happens on `vpc` format with or without `oformat=fixed`, it seems that windows version of qemu-img has some incorrect operation? My guess is that windows version of qemu-img doesn't handle the description field of vpc/vhdx, which leads to an incorrect `disk size` field. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1759522/+subscriptions
