good question? While we are on that topic, I did a time machine on an external before installing Lion. Can I plug that external in and do another time machine or will it over write my Snow Leopard. I am asking will I lose SL if I do another TM back up on the same external. Not trying to high jack your thread Kahnyl.
Lion's Disk Utility tries to make it easy but here's the sequence that I think fails.
1 - Normal install of Lion on drive creates Recovery HD
2 - Split Lion partion in two - DU moves Recovery HD between visible partitions.
3 - Install Lion on 2nd partition - it doesn't create a Recovery HD since one already exists on drive.
4 - Delete 1st partition - DU removes Recovery HD as well.
I will give it a try and report back.
----update---- Tried it and installing Lion in 2nd partition does create a second Recovery HD. So deleting the 1st partition also deletes the corresponding Recovery HD so leaves the 2nd one fine. Then creating a new first partition and then copying the 2nd Lion to it also recreates a Recovery HD for it. Apple did a good job on this and covered all of the bases. I must have screwed up something else the last time I tried this.
Can I plug that external in and do another time machine or will it over write my Snow Leopard. I am asking will I lose SL if I do another TM back up on the same external.
Both Lion and SL are supposed to ask before doing anything with an existing TM backup. Just to be sure you can re-name your Mac which will force it to save to a different directory leaving the existing alone.