virtualbox.org

Hi all,

I'm trying to create a 3TB VMDK VHD, Fixed with Split2G configuration on a 4TB USB attached drive. For the purpose of my project the virtual hard drive must be split into chunks instead of one large VHD. The usb drive is blank to start. I can create a 2TB via the GUI without a problem but I understand it can't be done for a VHD greater than 2TB from GUI. I tried doing it from VMWARE but it takes so much longer and it still can't create it. There's nothing wrong with the USB drive that I'm aware of because I can fill it with almost 4TB of data without any problems.

All assistance is greatly appreciated. Thank you.

Specs:
Windows 7 x64
4TB USB drive
Virtualbox 4.3.12

Below is the command line and results.

C:\Program Files\Oracle\VirtualBox>vboxmanage createhd --filename z:\temp\test.vmdk --size 3000000 --format VMDK --variant Fixed,Split2G
0%...10%...20%...30%...40%...50%...60%...70%...80%...90%...
Progress state: VBOX_E_FILE_ERROR
VBoxManage.exe: error: Failed to create hard disk
VBoxManage.exe: error: Could not create the medium storage unit 'z:\temp\test.vmdk'.
VBoxManage.exe: error: VMDK: descriptor too big in 'z:\temp\test.vmdk' (VERR_BUFFER_OVERFLOW).
VBoxManage.exe: error: VMDK: could not insert the extent list into descriptor in 'z:\temp\test.vmdk' (VERR_BUFFER_OVERFLOW)
VBoxManage.exe: error: Details: code VBOX_E_FILE_ERROR (0x80bb0004), component Medium, interface IMedium
VBoxManage.exe: error: Context: "int __cdecl handleCreateHardDisk(struct HandlerArg *)" at line 391 of file VBoxManageDisk.cpp

At present VirtualBox does not support drives larger than 2TB.

Just to clarify, VB doesn't even support 2TB+ as secondary vhd? I'm not creating the main vhd to be larger than 2TB.

What would you recommend if I need a vhd used as storage beyond 2TB without attaching it as a direct drive access?

You size variant can't be 3000000 as that is more than VirtualBox supports. If you need a second drive of 2TB then create a new virtual drive and attach it as such.
Split2G does not change the container.