I don't see any reason why that wouldn't work. It might take a little extra doing to convince the program you're attempting to clone another drive, not the current boot drive, but I see no particular reason why it shouldn't be possible.
Running a MacPro with both Leopard and Snow Leopard os drives.
I was wondering if it was possible to use CCC to back up my Snow Leopard drive by running CCC when booted in Leopard and vice versa?
This way the os drive being backed up will not have processes running when being copied. I will just designate the SL drive to be backed up and point CCC to my external CalDigit eSATA...
Will this work?
I will then do the same vice versa to BU the Leopard HD...
Can CCC be used this way for full backups???
Is CCC as good as SuperDuper?