Ranulph Glanville wrote on 2/4/09 at 17:33

>I tried to avoid giving just such information because it complicates
>the matter.

unfortunately that also governs the scope of the advice:-) Which 
is therefore -- "delete what you don't want" (ie not much use)
>
>I was using TM on TC. My computer needed to go to hospital. It came
>back with a new mother board. It needed to go to hospital again, and it
>came back with another new mother board. I've looked at the terminal
>commands (and the various corrections) that allow you to continue using
>old backups with new mother boards, but there is nothing I have removed
>from my machine since I started using TM TC and rather than try to deal
>with terminal, I would just like to start again.
>
>However, there is a second machine backed up on the same TC, so I don't
>want to erase the disc. At the moment all I see on my machine when I
>look at TC is an image of the old backups I made on my machine drifting
>back into the origins of the universe.
>
>And all I want to do is erase all of that and start again from the
>machine as it is now with the new mother board.

Do you see two sparse disk images? If so, one will have a name 
like > yourUserName’s MacBook (3)_002332c4f68c.sparsebundle

I believe the number is the MAC address. So you should be able 
to identify which sparseimage goes with which machine.

Alternatively, if you want for some reason to play it 
ultra-safe, open Time Machine to see the infinite universe, 
select Macintosh HD (or whatever), and select 'Delete All 
Backups' from the action menu.


BUT - if in fact the change of mother board has not affected the 
link with the back-up (which is how it sounds so maybe it's the 
logic board that changes that), what you have there is ALREADY a 
back-up of your current situation. If it hasn't changed much, 
then you have a current back-up on TM already and deleting it 
would just require you to do it all over again to no gain.


So in a way I still don't understand what you want to do. If 
it's about saving space, it's a different answer again. But it 
sounds as if you don't need to delete it as it would make hardly 
any difference, but waste an awful lot of CPU cycles and time.


Or am I missing something?


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