virtualbox.org

Hi Good Evening. I am a new user for the VirtualBox forum and it will be very helpful if you could help to find a solution for my below question.

I have a Windows 7 OS [mywin7] running in a VM ware or somewere [Cloud]. Basically i can log-in to any laptop/desktop, open a browser, and can connect to mywin7 which is in a cloud. Inside mywin7, i have installed Oracle VirtualBox 4.3.

Now my requirement is, i want to create a guest OS [Ubutu 64bit] using my VirtualBox which is running in a cloud machine mywin7.

When doing so, i am not seeing the 64bit option enabled in VirtaulBox [only 32bit option enabled]. How to enable 64bit [or VT-x] in mywin7 [a OS running in cloud].

Note:
I know how to enable the 64bit option for the VirtualBox when it is installed in a Physical Laptop/Desktop. It can be done by enabling the "Virtualization Technology" in the BIOS and reboot the machine.

You need to ask your cloud provider if their solution supports nested virtualization and how to enable this in their virtual hardware.
As soon as Virtualbox sees it as available you can select the setting for the guest VM.
(But I haven't seen any cloud solution offering this feature.)

Sathya NA wrote:
Note:
I know how to enable the 64bit option for the VirtualBox when it is installed in a Physical Laptop/Desktop. It can be done by enabling the "Virtualization Technology" in the BIOS and reboot the machine.

And there is the vital clue. A virtual machine is virtual, not physical, so it does not have a BIOS. There are no physical components for the BIOS to control.

BillG wrote:

Sathya NA wrote:
Note:
I know how to enable the 64bit option for the VirtualBox when it is installed in a Physical Laptop/Desktop. It can be done by enabling the "Virtualization Technology" in the BIOS and reboot the machine.

And there is the vital clue. A virtual machine is virtual, not physical, so it does not have a BIOS. There are no physical components for the BIOS to control.

Nonsense, a virtual machine does have a BIOS (or EFI), as the guest OS expects one and interacts with it. The BIOS exposes features of the virtual hardware.

Unfortunately, this does not help the OP. The features exposed by the BIOS in a VM are controlled by the host hypervisor. No cloud service provider exposes VT-x for a guest, and nested 64bit virtualization is usually impossible.

Thank you All for the reply.

Just got an info. My virtual mywin7 is running on Operating System: VMware ESXi 5.0 in the server HP BL460c.