[Qemu-devel] [Bug 1223467] Re: Unable to use USB as hda in Windows

[Kevin Wolf]

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?

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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.

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