I have a mid2011 Mac Mini I upgraded with two Intel 240GB 520Series SSDs some time ago. Have not yet upgraded to mountain lion but will do in a few days time. Would it be ok to use an SSD as Time Machine? Thing is I sometimes bring the machine to work and don't want too much to carry - so internal drives is a big plus. I do have a external FW800 drive I make regular cloned backups to. Until now I have been running them as two separate drives, but don't really need all that storage as I have just finished building my new home server.