I think this has been fixed by commit 68dc0364, which was included in qemu 1.7.0 and also backported to 1.6.1. Can you please try upgrading and confirm whether it fixes the problem?
-- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1223467 Title: Unable to use USB as hda in Windows Status in QEMU: New Bug description: I built qemu 1.6.0 from source in MinGW (and all dependents not available with mingw-get) The command line: qemu-system-i386.exe -m 1024 -hda \\.\PhysicalDrive1 -L pc-bios or qemu-system-x86_64.exe -m 1024 -hda \\.\PhysicalDrive1 -L pc-bios (or the *w.exe equivalents) reports in stderr.txt: qemu-system-i386.exe: -hda \\.\PhysicalDrive1: Block protocol 'host_device' doesn't support the option 'filename' qemu-system-i386.exe: -hda \\.\PhysicalDrive1: could not open disk image \\.\PhysicalDrive1: Invalid argument I have also found this bug in 1.5 but not in 1.4 Some Help: The code in Qemu is a bit beyond me at 1am, but I was able to determine the root cause seems to be that block.c is becoming confused about referring to a file but not having a file name. I have been able to work around this by changing line 860 of block.c from: "if (qdict_size(options) != 0) {" to "if (qdict_size(options) != 0 && !is_windows_drive(filename)) {" But I don't think this is a good solution (it is assuming that nothing else could be wrong), and I can't be sure that I'm not masking some real issue. FWIW; Build is on XP, but execution is on Win7. Thanks. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1223467/+subscriptions
