One of my colleagues had issues on her MBP recently, and I had to take a look at it. It turned out that the machine was still running Leopard and had a bunch of junk installed on it. For the sake of security I upgraded the system to Lion and placed her documents to where they were, using her Time Machine backups.
Everything seems to work fine, tho I couple of questions arose:
- Will Time Machine work as it is? (it's on an external disk with only one partition)
- Will she be able to browse through her old backed up files while running the new Lion system?
My guess is that the Lion backups will not be compatible with the old backups, as in she will not be able to "continue" on the old backup. However I don't see why it would be a problem to have two different sparsebundles in the same disk. As for "entering Time Machine" from Lion, I'm not sure if that will work as Time Machine seems to use one sparsebundle for the backups and I haven't seen any ways of selecting a sparsebundle.
Can anyone confirm or deny these assumptions?