hi.. VMAX newbie here

I have been working with VMAX for about 6 months now and we are adding 2 more engines to our VMAX20K. Currently we have a single "controller" cabinet with engines 4/5 as well as 2 disk cabinets which are daisy chained to the engines 4/5. We have our 124 TB of FC pool now and are at about %90 capacity. We are buying 2 more engines that will become engine 3/6 along with another disk cabinet with 44TB of more storage. This new 44TB of storage will be connected physically to engines 3/6. So my question is... Will the new 44TB become a separate/new pool or will it become one with the existing 124 TB pool (extending it to 168TB). The reason i ask is if the new 44TB "merges" so to speak with the existing 124 TB then the data will automatically spread across ALL our disks. We will create new zoning etc for new hosts but our current utilization of our existing pool will become better by 44TB.

OR

Will be have a totally separate new FC pool of 44TB. We would use the new FC pool for future growth and our current FC pool will remain at %90 used. If we want to move luns from the current 124tb pool to the new 44TB pool that would take some doing (no need to answer that now)

So.. basically will we get just more space (44TB) in our existing pool OR will we have a whole new pool??

regards

john