Richard Shaw wrote:
> On Fri, Feb 19, 2010 at 11:39 AM, Mike Bydalek
> <mbydalek AT compunetconsulting DOT com> wrote:
>   
>> On Fri, Feb 19, 2010 at 10:11 AM, John Moorhouse
>> <john.moorhouse AT 3jays.me DOT uk> wrote:
>>     
>>> I'm happily using backupPC to backup a number of machine within our home 
>>> network, I'm wondering what will happen if I use it to backup the file on 
>>> the host machine that is the virtual disc for a number of virtual box VM, 
>>> will it have to backup the whole file each run (they are rather large) or 
>>> is it capable of only copying those bits of the file that have changed ?
>>>
>>> Basically I'm after suggestions of 'best practice' in this situation
>>>       
>> An image is exactly that, a binary image.  The best thing would be use
>> BackupPC to connect to the actually Virtual Host and back that up.
>>     
>
> I think the OP understands that the first backup would be the whole
> virtual disk file, what he's asking is will subsequent incremental
> backups be a diff of the first.
>
> Richard
>   

The answer here is (assuming an rsync transfer method) the difference 
will be transfered, but a separate copy of the whole image will be stored.

Chris


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