On Sat, 10 Mar 2007, Mike Shultz wrote:
> Hello.  I'm trying to plug our g4u disk images into virtual machines on
> my workstation.  Problem is, there's limited space on this machine.
>
> The image I'm trying to write to the virtual disk is only 2.8GB but when
> doing a 'slurpdisk' it writes much more then that(up to 9GB before the
> VM errored out).
>
> Why is g4u trying to write more data then is necessary?  If g4u only
> uses 'dd' to create the image, I'd imagine it would just be a block by
> block copy excluding blank/empty blocks.  Is there any way I can go
> about having it write only the necessary data?

g4u doesn't know about what data is 'necessary' or not, it creates a 1:1 
image of the source disk, and then later writes the exact amount of data 
back. If y ou have a 9GB disk with ~no data at the end that shouldn't do 
much harm to abort earlier if your target disk is too small.

When putting a 'big' image onto a 'small' disk you should just make sure 
that the 'extra' space is on a separate partition or in unpartitioned 
space, else nasty things may happen to your data.


  - Hubert

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