cruise control rebalance rack aware

[mano1233]

I was looking in the docs but couldn't quite find an answer. Let's say I have a cluster of 3 nodes (one in each rack). I create another three nodes (0ne in each rack) and run a rebalance (with rack awareness) to remove the first 3. Will the data from each node be transferred to the node on the same rack, or will it be random and match the goal of the rebalance (in this case, rack awareness)? I appreciate any help you can provide.