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

[David]

Public bug reported:

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.

** Affects: qemu
     Importance: Undecided
         Status: New

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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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