use same hard drive for two different time machine
I have a 1 gig external hard drive that I used on a macbook that i own running mountain lion to back up the macbook hard drive. I wanted to backup my macbook pro as well using time machine. can i use the same external hard drive that I used to back up my macbook? will it automatically create a separate folder for the pro? i don't want to overwrite the macbook time machine backup.