We work on documentary and we use a Pegasus 2 R6 on a mac pro with thunderbolt 2

We are getting a Pegasus 3 R6

We need to use both discs Pegasus 2 and 3 on the same mac pro with thunderbolt 2

As we understand we need to installed a new drive for the Pegasus 3 and it should work on the mac pro with an adaptor - thunderbolt 2 to 3? Is that right?

If we installed this new drive for Pegasus 3 does it affect the drive for Pegasus 2? 

Can we work wiht both discs on this computer or is there a possiblity of conflict in terms of drives?

Is there any issues we shold be awre of using a Pegasus 3 on a thunderbolt 2 via an adaptor?

Thanks very much

Carlos Ruiz