[Qemu-devel] [Bug 686613] [NEW] USB MSD are not marked as removable

[Qemu-devel] [Bug 686613] [NEW] USB MSD are not marked as removable

[Justin M. Forbes]

Public bug reported:

 Filed from Fedora bug:
https://bugzilla.redhat.com/show_bug.cgi?id=589130

Guests can access USB Mass Storage Device, but fail to mark them as
removable.

** Affects: qemu
     Importance: Undecided
         Status: New

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Title:
  USB MSD are not marked as removable

Status in QEMU:
  New

Bug description:
   Filed from Fedora bug: https://bugzilla.redhat.com/show_bug.cgi?id=589130

Guests can access USB Mass Storage Device, but fail to mark them as removable.

[Qemu-devel] [Bug 686613] Re: USB MSD are not marked as removable

[Stefan Hajnoczi]

** Changed in: qemu
       Status: New => Confirmed

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Title:
  USB MSD are not marked as removable

Status in QEMU:
  Confirmed

Bug description:
   Filed from Fedora bug: https://bugzilla.redhat.com/show_bug.cgi?id=589130

Guests can access USB Mass Storage Device, but fail to mark them as removable.

[Qemu-devel] [Bug 686613] Re: USB MSD are not marked as removable

[Stefan Hajnoczi]

danpb has mentioned that Linux gets this information from SCSI INQUIRY
response.  So it's up to the USB Mass Storage Device to decide whether
or not it wants to have a removable medium.

The SCSI INQUIRY RMB (removable medium bit) tends to be set on modern
USB Mass Storage Devices.  Of course they don't actually have a
removable medium.

One side-effect of setting this bit is that Windows Auto-Run will work
if RMB=0 but not work if RMB=0.  Also, on RMB=1 devices only the first
partition is displayed by Windows - you can't have more than one
partition on the device.

For more information, see:
http://www.microsoft.com/whdc/connect/usb/usbfaq.mspx

So at the end of the day, it's up to QEMU whether or not to mark USB
MSDs as having removable media.  Since modern devices tend to set RMB=1,
we probably should too.

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https://bugs.launchpad.net/bugs/686613

Title:
  USB MSD are not marked as removable

Status in QEMU:
  Confirmed

Bug description:
   Filed from Fedora bug: https://bugzilla.redhat.com/show_bug.cgi?id=589130

Guests can access USB Mass Storage Device, but fail to mark them as removable.

[Qemu-devel] [Bug 686613] Re: USB MSD are not marked as removable

[Stefan Hajnoczi]

"One side-effect of setting this bit is that Windows Auto-Run will work
if RMB=0 but not work if RMB=0" should read "but not work if RMB=1".

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Title:
  USB MSD are not marked as removable

Status in QEMU:
  Confirmed

Bug description:
   Filed from Fedora bug: https://bugzilla.redhat.com/show_bug.cgi?id=589130

Guests can access USB Mass Storage Device, but fail to mark them as removable.

[Qemu-devel] [Bug 686613] Re: USB MSD are not marked as removable

[Stefan Hajnoczi]

A sampling of physical USB devices:
1. Noname 2GB USB stick: RMB=1
2. Nexus One USB storage: RMB=1
3. LaCie USB harddisk: RMB=0

I suspect there's no setting that will satisfy everyone here.  It makes
sense for a USB harddisk to set RMB=0 because that allows you to put on
more than one partition under Windows.

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https://bugs.launchpad.net/bugs/686613

Title:
  USB MSD are not marked as removable

Status in QEMU:
  Confirmed

Bug description:
   Filed from Fedora bug: https://bugzilla.redhat.com/show_bug.cgi?id=589130

Guests can access USB Mass Storage Device, but fail to mark them as removable.

Re: [Qemu-devel] [Bug 686613] Re: USB MSD are not marked as removable

[Christoph Hellwig]

On Tue, Jan 11, 2011 at 03:15:46PM -0000, Stefan Hajnoczi wrote:
> A sampling of physical USB devices:
> 1. Noname 2GB USB stick: RMB=1
> 2. Nexus One USB storage: RMB=1
> 3. LaCie USB harddisk: RMB=0
> 
> I suspect there's no setting that will satisfy everyone here.  It makes
> sense for a USB harddisk to set RMB=0 because that allows you to put on
> more than one partition under Windows.

We can make it a qdev property.

[Qemu-devel] [Bug 686613] Re: USB MSD are not marked as removable

[Sebastian Malcolm]

Stefan, you fixed this  in QEMU 24 Jan 2011 so this bug can be marked as
Fixed Released?

SEE: http://lists.gnu.org/archive/html/qemu-devel/2011-01/msg02425.html
Append ",removable=on" to a device definition for USB Mass Storage Devices to override the removable bit (but off by default):
> qemu -usb
>     -drive if=none,file=test.img,cache=none,id=disk0
>     -device usb-storage,drive=disk0,removable=on

However, I cannot see a way to set "removable=on" for usb-storage
devices started via libvirt (in 12.04, with libvirt-bin
0.9.8-2ubuntu17.1 and virt-manager 0.9.1-1ubuntu5.1).

So, is a feature request required for virt-manager to expose this option
for virtual disks (default to 'on' for bus='usb') and add support to
libvirt's XML to set "removable=on" ?

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https://bugs.launchpad.net/bugs/686613

Title:
  USB MSD are not marked as removable

Status in QEMU:
  Confirmed

Bug description:
   Filed from Fedora bug:
  https://bugzilla.redhat.com/show_bug.cgi?id=589130

  Guests can access USB Mass Storage Device, but fail to mark them as
  removable.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/686613/+subscriptions

Re: [Qemu-devel] [Bug 686613] Re: USB MSD are not marked as removable

[Stefan Hajnoczi]

On Mon, Jul 2, 2012 at 4:04 PM, Sebastian Malcolm
<686613@bugs.launchpad.net> wrote:
> Stefan, you fixed this  in QEMU 24 Jan 2011 so this bug can be marked as
> Fixed Released?

Yes

> However, I cannot see a way to set "removable=on" for usb-storage
> devices started via libvirt (in 12.04, with libvirt-bin
> 0.9.8-2ubuntu17.1 and virt-manager 0.9.1-1ubuntu5.1).
>
> So, is a feature request required for virt-manager to expose this option
> for virtual disks (default to 'on' for bus='usb') and add support to
> libvirt's XML to set "removable=on" ?

Yes, I just checked libvirt.git/master and cannot see a way to set the
removable option.  I'm afraid libvirt also needs changes.

Stefan

[Qemu-devel] [Bug 686613] Re: USB MSD are not marked as removable

[Thomas Huth]

Setting status to "Fix released" according to comment #5 (if there is
something left to do for libvirt, please consult their bugtracker
instead)

** Changed in: qemu
       Status: Confirmed => Fix Released

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https://bugs.launchpad.net/bugs/686613

Title:
  USB MSD are not marked as removable

Status in QEMU:
  Fix Released

Bug description:
   Filed from Fedora bug:
  https://bugzilla.redhat.com/show_bug.cgi?id=589130

  Guests can access USB Mass Storage Device, but fail to mark them as
  removable.

To manage notifications about this bug go to:
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