Cloned VMs are not able to mount ISO images

[isso1138]

VMs cloned either through the GUI or CLI, are not able to mount ISO images. If set before booting the clone vm, you receive the following error

Failed to open a session for the virtual machine Win7-x64 Clone.

DrvVD: Configuration error: Both "ReadOnly" and "Discard" are set (VERR_PDM_DRIVER_INVALID_PROPERTIES).

Failed to attach driver below us! The driver properties were invalid, and as a consequence construction failed. Caused my unusable media or similar problems. (VERR_PDM_DRIVER_INVALID_PROPERTIES).

PIIX3 cannot attach drive to the Secondary Master (VERR_PDM_DRIVER_INVALID_PROPERTIES).

Result Code: E_FAIL (0x80004005) Component: Console Interface: IConsole {db7ab4ca-2a3f-4183-9243-c1208da92392}

The original VM can mount ISO images without issue. Both VMs can attach to the host's CD-ROM drive. Affects both linked and full clones.

[isso1138]

Log file for cloned VM

[isso1138]

Original VM config

[isso1138]

Cloned VM config

[isso1138]

Issue resolved in 4.2.12

Correction - NOT FIXED.

I don't get it. Worked fine after upgrading. But today I cloned a VM and got the same error

[Klaus Espenlaub]

Not sure what we fixed, and the Win7-x64 Clone.vbox file doesn't really match the provided VBox.log. The former has an empty CD drive, where the latter clearly shows that there is something mounted.

So quite a mystery...

[g2flyer]

i have same problem with (linked) cloned ubuntu image on virtualbox 4.3.14: when trying to mount in a running vm it aborts the vm, if set in settings it does not boot at all. In both cases, the error is VERR_PDM_DRIVER_INVALID_PROPERTIES

[g2flyer]

ah, removing and re-adding the IDE device seems to solve the problem!!

[dantheperson]

Same problem here. Can confirm deleting the optical drive from the controller and re-adding it fixed the issue.

[aeichner]

Please reopen if still relevant with a recent VirtualBox release.