[Cialug] virtualbox

[Dave Hala Jr]

Did you find that when converting from a dd image to a vdi, that both
files ended up being about the same size?



On Sun, 2010-03-07 at 09:32 -0600, Paul Gray wrote:
> Dave Hala Jr wrote:
> > Is there
> > someway that I can make a new vdi, that is closer to the 40gb size?
> > 
> 
> Having recently shrunk several images here, the command that does somewhat of 
> what you're looking for is:
> 
> VBoxManage modifyvdi your.vdi compact
> 
> I quantified the above with "somewhat" because it takes some preparation to get 
> good results.  The key thing is to make sure that the slack space on your image 
> is zeroed out.  There are many howto's to explain how to do this with Windows 
> systems, but I got good results by making an all-zero vdi target and 
> subsequently (a) rsync'ing the root filesystem over, (b) installing grub to the 
> new MBR (b2) [optional] boot to verify it works, and then (c) compacting.
>