Able to add two identical DVD images, resulting in inaccessible VM with no error message

[Jamie Jackson]

Somehow, I was able to get into a situation where I had two identical attached CD images. This resulted in an "inaccessible" VM, with *no* error message to guide me to the problem/fix.

I was managing the VM via the GUI.

Here is the offending config snippet:

      <StorageController name="IDE Controller" type="PIIX4" PortCount="2">
        <AttachedDevice passthrough="false" type="DVD" port="0" device="0">
          <Image uuid="{aa281874-fdb0-421e-2194-7d0a4816598f}"/>
        </AttachedDevice>
        <AttachedDevice passthrough="false" type="DVD" port="0" device="1">
          <Image uuid="{aa281874-fdb0-421e-2194-7d0a4816598f}"/>
        </AttachedDevice>
      </StorageController>

This corresponds to the vbox guest additions DVD image:

  <Image uuid="{aa281874-fdb0-421e-2194-7d0a4816598f}" location="/usr/share/virtualbox/VBoxGuestAdditions.iso"/>

I'm not completely sure what I did to get in this situation, and don't have time to reproduce it, but here's what I think was the sequence.

1. Removed IDE and floppy controller, and started XP VM (with just the sata controller/vdi).
   
2. Shut down VM.
   
3. Added IDE controller, with the "Host Drive" first, and the vbox guest additions image second. Also added floppy controller with a floppy image.
   
4. Started VM and clicked "install guest additions" via the menu.
   
5. Shut down VM.
   
6. Shut down/restarted GUI?
   
7. GUI showed the inaccessible VM, with no error in the error box.
   

Removing both duplicate attached devices from the XML config yielded an accessible VM, and I was back in business.

[Jamie Jackson]

VM Config with Duplicate Attached DVD Images

[Technologov]

Confirmed. Bug still exists in 3.2.0

Just create a VM with 2 CD-ROMs, and insert GuestAdditions.iso into both.

-Technologov

[aeichner]

Please reopen if still relevant with a recent VirtualBox release.