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anisha@linux-uitj:~> cat /etc/issue && uname -a
Welcome to openSUSE 11.2 "Emerald" - Kernel \r (\l).

Linux linux-uitj 2.6.31.5-0.1-desktop #1 SMP PREEMPT 2009-10-26 15:49:03 +0100 x86_64 x86_64 x86_64 GNU/Linux

anisha@linux-uitj:~>

Doesn't this output show that this is a 64 bit machine?

Now when I try to load a 64 bit OpenSUSE 11.3 ISO on the VirtualBox, I get a message as shown in the thread title!

anisha@linux-uitj:~/tarBalls> file opensuse-dvd-x86_64.0702..001.iso
opensuse-dvd-x86_64.0702..001.iso: ISO 9660 CD-ROM filesystem data 'openSUSE-DVD-x86_64.0702..001  ' (bootable)

anisha@linux-uitj:~/tarBalls>
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3 Answers 3

up vote 3 down vote accepted

You probably have to recreate your virtual machine.

Be very careful in this step to select a 64-bit "Operating System Type", otherwise you will emulate a 32-bit guest machine (on your 64-bit host machine).

You need to recreate the virtual machine because "changing the type later has no effect on VM settings".

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Helpful :) But anyway, I just checked the version of VB install file I have, VirtualBox-3.2.8-64453-Linux_x86.run . –  TheIndependentAquarius Aug 9 '11 at 10:20
1  
Please, Write an answer to your own question and accept it. It could be useful to other users. blog.stackoverflow.com/2011/07/… –  andcoz Aug 9 '11 at 10:35
    
You don't have to say please. Let me verify it completely and I'll follow up soon. –  TheIndependentAquarius Aug 9 '11 at 10:40

You may need to enable virtualization support in the BIOS too...

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This is really a comment, not an answer to the question. Please use "add comment" to leave feedback for the author. –  Renan Aug 18 '12 at 6:02

For 64-bit guests, you need:

  1. a 64-bit CPU
  2. a CPU capable of hardware virtualisation
  3. the 64-bit version of VirtualBox

if any of the points is unfulfilled, you can only run 32-bit guests.

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2  
You can run a 64-bit guest with VirtualBox as long as you have a 64-bit CPU with virtualization support, even if the host OS is 32-bit. –  Gilles Aug 9 '11 at 23:53
    
Downvoted - blatently wrong as Gilles notes. –  Aaron D. Marasco Aug 10 '11 at 0:09
    
changed "host" to "CPU", thanks –  oenone Aug 10 '11 at 6:21

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