vboxmanage modifyhd corrupts vhd files

[nim]

I tried to resize some of my VHD files which I formerly ran using Microsoft VPC.

vboxmanage modifyhd abc.vhd --resize 25600

The command runs without error. But I'm not able to boot into the guest OS anymore; the VHD is corrupt.

However If I convert the VHD to VDI using

vboxmanage clonehd --format VDI

and run the modifyhd command, everything works fine - I can boot into the guest OS on the VDI.

I googled and found this guy ( http://wp.sjkp.dk/tag/modifyhd/) is also having the same problem.

[aeichner]

Not reproducible here. Could you be a bit more specific about the guest you are using? The size of the VHD before you tried to resize it would be helpful too.

[nim]

I tested with another vhd disk which has a virtual size of 32gb. The VHD is used as a data disk inside the guest OS (Windows XP).

vboxmanage modifyhd the.vhd --resize 35600

After this command, I boot into the guest OS and the disk is shown as Unknown and 'Not initialized' in Disk Management.

[nim]

It seems modifyhd cannot shrink the VHD. If I specify a smaller size than 32gb I got:

Progress state: VBOX_E_NOT_SUPPORTED VBoxManage: error: Resize hard disk operation for this format is not implemented yet!

I'm not sure if it's by design or a bug.

[nim]

Oh, please note - the VHD files were originally created using Microsoft Virtual PC 2007.

[nim]

Again, I did clonehd on that VHD to VDI format and could successfully resize the VDI disk to a larger size.