On 28/03/2014 12:25, Marco Tullio wrote:
Hi,First thank you for accepting me in the community virtualbox.My question is about, i think with a bug! The problem is with my computer is Windows 7 Professionnel, system 64 bits,ok! But,when I create a virtual machine and type Microsoft Windows, the option 64 bits not exist, only 32 bits. for all and even Linux,Solaris, etc.Obs: In my machine I use ubuntu 64 bits. SoI can not use the virtual box because it does not work./In/ /use an existing virtual hard disk *the option( Ubuntu 64b). /You know what it could be? Thanks a lot! Marco Alves.
Hi Marco, check out Chapter 3 of the Manual: https://www.virtualbox.org/manual/ch03.html
Specifically, section 3.1.2:
3.1.2. 64-bit guests
VirtualBox supports 64-bit guest operating systems, even on 32-bit host
operating systems,^[11
<https://www.virtualbox.org/manual/ch03.html#ftn.idp50374048>] provided
that the following conditions are met:
1. You need a 64-bit processor with hardware virtualization support (see Section 10.3, "Hardware vs. software virtualization" <https://www.virtualbox.org/manual/ch10.html#hwvirt>). 2. You must enable hardware virtualization for the particular VM for which you want 64-bit support; software virtualization is not supported for 64-bit VMs. 3. If you want to use 64-bit guest support on a 32-bit host operating system, you must also select a 64-bit operating system for the particular VM. Since supporting 64 bits on 32-bit hosts incurs additional overhead, VirtualBox only enables this support upon explicit request. On 64-bit hosts (which typically come with hardware virtualization support), 64-bit guest operating systems are always supported regardless of settings, so you can simply install a 64-bit operating system in the guest. WarningOn any host, you should enable the *I/O APIC* for virtual machines that you intend to use in 64-bit mode. This is especially true for 64-bit Windows VMs. See Section 3.3.2, ""Advanced" tab" <https://www.virtualbox.org/manual/ch03.html#settings-general-advanced>. In addition, for 64-bit Windows guests, you should make sure that the VM uses the *Intel networking device*, since there is no 64-bit driver support for the AMD PCNet card; see Section 6.1, "Virtual networking hardware" <https://www.virtualbox.org/manual/ch06.html#nichardware>.
If you use the "Create VM" wizard of the VirtualBox graphical user interface (see Section 1.7, "Creating your first virtual machine" <https://www.virtualbox.org/manual/ch01.html#gui-createvm>), VirtualBox will automatically use the correct settings for each selected 64-bit operating system type.
Hope this helps. Giles -- Regards, Giles Coochey, CCNP, CCNA, CCNAS NetSecSpec Ltd +44 (0) 8444 780677 +44 (0) 7983 877438 http://www.coochey.net http://www.netsecspec.co.uk gi...@coochey.net
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