[vbox-dev] createBaseStorage() fails with VERR_INVALID_PARAMETER

[Karoline Haus]

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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[Maxime Dor]

Provide the part of your code that fails please, else it's a bit hard to
give you pointers.

Post by Karoline Haus
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.
_______________________________________________
vbox-dev mailing list
vbox-dev at virtualbox.org
https://www.virtualbox.org/mailman/listinfo/vbox-dev

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[Karoline Haus]

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.

Post by Karoline Haus
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.
_______________________________________________
vbox-dev mailing list
vbox-dev at virtualbox.org
https://www.virtualbox.org/mailman/listinfo/vbox-dev

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[Maxime Dor]

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.

Post by Karoline Haus
format='vdi'
diskImagePath='/home/user/test.vdi'
size=10000000
hdd = self.vboxMgr.vbox.createHardDisk(format, diskImagePath)
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!
Provide the part of your code that fails please, else it's a bit hard to give you pointers.
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.
_______________________________________________
vbox-dev mailing list
vbox-dev at virtualbox.org
https://www.virtualbox.org/mailman/listinfo/vbox-dev

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[Karoline Haus]

Yes it is an array. The type of size is int as there is no long type in Python.



Maxime Dor <maxime.dor at altherian.org> schrieb am 15:07 Freitag, 6.Juni 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.

Post by Karoline Haus
format='vdi'
diskImagePath='/home/user/test.vdi'
size=10000000
hdd = self.vboxMgr.vbox.createHardDisk(format, diskImagePath)
??????????? 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!
Provide the part of your code that fails please, else it's a bit hard to give you pointers.
Hi I'm trying to create a virtual hard drive using the Python API.

Post by Karoline Haus
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.
_______________________________________________
vbox-dev mailing list
vbox-dev at virtualbox.org
https://www.virtualbox.org/mailman/listinfo/vbox-dev

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[Maxime Dor]

?Then I don't know :( no such exception is documented (even tho its
significance is clear) and I don't know which parameter is wrong or invalid.
Hopefully the devs will have an answer.?

Post by Karoline Haus
Yes it is an array. The type of size is int as there is no long type in Python.
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.
format='vdi'
diskImagePath='/home/user/test.vdi'
size=10000000
hdd = self.vboxMgr.vbox.createHardDisk(format, diskImagePath)
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!
Provide the part of your code that fails please, else it's a bit hard to give you pointers.
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.
_______________________________________________
vbox-dev mailing list
vbox-dev at virtualbox.org
https://www.virtualbox.org/mailman/listinfo/vbox-dev

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[Karoline Haus]

I have now figured that the problem seems to be the format itself. If I used 'vmdk' instead of 'vdi' then it works. How is that possible, if using VBoxManage I can create VDI images? Do I have to pass a different set of parameters when using VDI? Or is a different type of image (
MediumVariant) required when doing createBaseStorage() with the vdi format? Anyone got any pointers?



Maxime Dor <maxime.dor at altherian.org> schrieb am 8:35 Sonntag, 8.Juni 2014:



?Then I don't know :( no such exception is documented (even tho its significance is clear) and I don't know which parameter is wrong or invalid.
Hopefully the devs will have an answer.?



On 6 June 2014 17:01, Karoline Haus <karolinehaus at yahoo.de> wrote:

Yes it is an array. The type of size is int as there is no long type in Python.

Post by Karoline Haus
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.

Post by Karoline Haus
format='vdi'
diskImagePath='/home/user/test.vdi'
size=10000000
hdd = self.vboxMgr.vbox.createHardDisk(format, diskImagePath)
??????????? 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!
Provide the part of your code that fails please, else it's a bit hard to give you pointers.
Hi I'm trying to create a virtual hard drive using the Python API.

Post by Karoline Haus
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.
_______________________________________________
vbox-dev mailing list
vbox-dev at virtualbox.org
https://www.virtualbox.org/mailman/listinfo/vbox-dev

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[Maxime Dor]

What values do you get if you enumerate ISystemProperties::mediumFormats <https://www.virtualbox.org/sdkref/interface_i_system_properties.html#a3fddf22466361f98b6dc9fc4458d1049> ?



From: Karoline Haus [mailto:karolinehaus at yahoo.de]
Sent: 10 June 2014 13:17
To: Maxime Dor
Cc: vbox-dev at virtualbox.org
Subject: Re: [vbox-dev] createBaseStorage() fails with VERR_INVALID_PARAMETER



I have now figured that the problem seems to be the format itself. If I used 'vmdk' instead of 'vdi' then it works. How is that possible, if using VBoxManage I can create VDI images? Do I have to pass a different set of parameters when using VDI? Or is a different type of image (
MediumVariant <https://www.virtualbox.org/sdkref/_virtual_box_8idl.html#adedcbf1a6e5e35fe7a0ca0c4b3447154> ) required when doing createBaseStorage() with the vdi format? Anyone got any pointers?



Maxime Dor <maxime.dor at altherian.org <mailto:maxime.dor at altherian.org> > schrieb am 8:35 Sonntag, 8.Juni 2014:



?Then I don't know :( no such exception is documented (even tho its significance is clear) and I don't know which parameter is wrong or invalid.

Hopefully the devs will have an answer.?



On 6 June 2014 17:01, Karoline Haus <karolinehaus at yahoo.de <mailto:karolinehaus at yahoo.de> > wrote:

Yes it is an array. The type of size is int as there is no long type in Python.



Maxime Dor <maxime.dor at altherian.org <mailto:maxime.dor at altherian.org> > schrieb am 15:07 Freitag, 6.Juni 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 <mailto: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 <mailto: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 <mailto: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.


_______________________________________________
vbox-dev mailing list
vbox-dev at virtualbox.org <mailto:vbox-dev at virtualbox.org>
https://www.virtualbox.org/mailman/listinfo/vbox-dev













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[Klaus Espenlaub]

You're thinking too complicated... it's really an invalid parameter. The
trouble is the attempt to pass 10000000 to the logicalSize parameter
(which is arguably a bit underspecified and there could be a better
error message): it's impossible to create an image of this logical size
in any of the image formats I'm aware of, simply because they have a
minimum storage unit of 512 bytes. 10000000 (10MB by the SI definition)
isn't a multiple of 512.

VBoxManage createhd can't do this either (note that most people use the
--size option to specify the image size in MiBytes, which means that
this issue is hidden, but there's the --sizebytes option)...

Klaus

Post by Maxime Dor
What values do you get if you enumerate ISystemProperties::mediumFormats
<https://www.virtualbox.org/sdkref/interface_i_system_properties.html#a3fddf22466361f98b6dc9fc4458d1049>?
*From:*Karoline Haus [mailto:karolinehaus at yahoo.de]
*Sent:* 10 June 2014 13:17
*To:* Maxime Dor
*Cc:* vbox-dev at virtualbox.org
*Subject:* Re: [vbox-dev] createBaseStorage() fails with
VERR_INVALID_PARAMETER
I have now figured that the problem seems to be the format itself. If I
used 'vmdk' instead of 'vdi' then it works. How is that possible, if
using VBoxManage I can create VDI images? Do I have to pass a different
set of parameters when using VDI? Or is a different type of image (
MediumVariant
<https://www.virtualbox.org/sdkref/_virtual_box_8idl.html#adedcbf1a6e5e35fe7a0ca0c4b3447154>)
required when doing createBaseStorage() with the vdi format? Anyone got
any pointers?
Maxime Dor <maxime.dor at altherian.org <mailto:maxime.dor at altherian.org>>
?Then I don't know :( no such exception is documented (even tho its
significance is clear) and I don't know which parameter is wrong or invalid.
Hopefully the devs will have an answer.?
On 6 June 2014 17:01, Karoline Haus <karolinehaus at yahoo.de
Yes it is an array. The type of size is int as there is no long type in Python.
Maxime Dor <maxime.dor at altherian.org
<mailto:maxime.dor at altherian.org>> schrieb am 15:07 Freitag, 6.Juni
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
This is the very simple code that fails over and over again and
format='vdi'
diskImagePath='/home/user/test.vdi'
size=10000000
hdd = self.vboxMgr.vbox.createHardDisk(format, diskImagePath)
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
<mailto:maxime.dor at altherian.org>> schrieb am 8:58 Freitag,
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
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.

[Karoline Haus]

you are absolutely right, it works now using a size that is a multiple of 512 bytes



Klaus Espenlaub <klaus.espenlaub at oracle.com> schrieb am 13:49 Mittwoch, 11.Juni 2014:



You're thinking too complicated... it's really an invalid parameter. The
trouble is the attempt to pass 10000000 to the logicalSize parameter
(which is arguably a bit underspecified and there could be a better
error message): it's impossible to create an image of this logical size
in any of the image formats I'm aware of, simply because they have a
minimum storage unit of 512 bytes. 10000000 (10MB by the SI definition)
isn't a multiple of 512.

VBoxManage createhd can't do this either (note that most people use the
--size option to specify the image size in MiBytes, which means that
this issue is hidden, but there's the --sizebytes option)...

Klaus

Post by Maxime Dor
What values do you get if you enumerate ISystemProperties::mediumFormats
<https://www.virtualbox.org/sdkref/interface_i_system_properties.html#a3fddf22466361f98b6dc9fc4458d1049>?
*From:*Karoline Haus [mailto:karolinehaus at yahoo.de]
*Sent:* 10 June 2014 13:17
*To:* Maxime Dor
*Cc:* vbox-dev at virtualbox.org
*Subject:* Re: [vbox-dev] createBaseStorage() fails with
VERR_INVALID_PARAMETER
I have now figured that the problem seems to be the format itself. If I
used 'vmdk' instead of 'vdi' then it works. How is that possible, if
using VBoxManage I can create VDI images? Do I have to pass a different
set of parameters when using VDI? Or is a different type of image (
MediumVariant
<https://www.virtualbox.org/sdkref/_virtual_box_8idl.html#adedcbf1a6e5e35fe7a0ca0c4b3447154>)
required when doing createBaseStorage() with the vdi format? Anyone got
any pointers?
Maxime Dor <maxime.dor at altherian.org <mailto:maxime.dor at altherian.org>>
?Then I don't know :( no such exception is documented (even tho its
significance is clear) and I don't know which parameter is wrong or invalid.
Hopefully the devs will have an answer.?
On 6 June 2014 17:01, Karoline Haus <karolinehaus at yahoo.de
? ? Yes it is an array. The type of size is int as there is no long type
? ? in Python.
? ? Maxime Dor <maxime.dor at altherian.org
? ? <mailto:maxime.dor at altherian.org>> schrieb am 15:07 Freitag, 6.Juni
? ? 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
? ? ? ? This is the very simple code that fails over and over again and
? ? ? ? format='vdi'
? ? ? ? diskImagePath='/home/user/test.vdi'
? ? ? ? size=10000000
? ? ? ? hdd = self.vboxMgr.vbox.createHardDisk(format, diskImagePath)
? ? ? ? ? ? ? ? ? ? ? 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
? ? ? ? <mailto:maxime.dor at altherian.org>> schrieb am 8:58 Freitag,
? ? ? ? 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
? ? ? ? ? ? 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.

_______________________________________________
vbox-dev mailing list
vbox-dev at virtualbox.org
https://www.virtualbox.org/mailman/listinfo/vbox-dev
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