[vbox-dev] createBaseStorage() fails with VERR_INVALID_PARAMETER

Maxime Dor maxime.dor at altherian.org
Fri Jun 6 13:06:52 UTC 2014

Never wrote python, but it looks good. Can you simply confirm
that self.vboxMgr.constants.MediumVariant_Standard is given in an array?
(it looks like but not sure).
Else, the size needs to be a long, if such type exists in Python.

On 6 June 2014 11:28, Karoline Haus <karolinehaus at yahoo.de> wrote:

> This is the very simple code that fails over and over again and I don't
> know how to fix it:
> format='vdi'
> diskImagePath='/home/user/test.vdi'
> size=10000000
> hdd = self.vboxMgr.vbox.createHardDisk(format, diskImagePath)
>         try:
>             progress = hdd.createBaseStorage(size,
>                                              (self.vboxMgr.constants.
>                                               MediumVariant_Standard,))
> ...
> This code throws an exception and tells me error code
> VERR_INVALID_PARAMETER as mentioned above. Any idea how to fix this?
> It fails in createBaseStorage().
> Thanks!
>    Maxime Dor <maxime.dor at altherian.org> schrieb am 8:58 Freitag, 6.Juni
> 2014:
> Provide the part of your code that fails please, else it's a bit hard to
> give you pointers.
>  On 5 June 2014 16:25, Karoline Haus <karolinehaus at yahoo.de> wrote:
> Hi I'm trying to create a virtual hard drive using the Python API.
> I can successully create the IMedium object using
> IVirtualBox::createHardDisk() but then when I try to call
> createBaseStorage() on that object, I can an error saying "Error in module
> Medium (VERR_INVALID_PARAMETER)" but I do not get any further details on
> what the problem is.
>  According to the SDK documentation, the only error for this function
> should be if the medium format is not supported by my system ("The variant
> of storage creation operation is not supported."), but I am just trying to
> create a VDI disk, and when I list the HDD backends using VBoxManage, it is
> definitely supported. The path I'm trying to create the virtual disk under
> is also accessible and writable.
> What else can the problem be? I do not seem to be able to dig deeper into
> this. I'm using the *MediumVariant_Standard* variant, so there is nothing
> special about this either.
> Any pointers would be really appreciated.
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