To facilitate a Capacity Consolidation (CapCon) in a chassis that is physically full (both data pack slots occupied) and logically utilized above the threshold to allow internal evacuation, the standard procedure requires temporary external capacity, often referred to as "swing gear." In this scenario, the FlashArray//X20 chassis is fully populated with two 22TB data packs. Since there are no empty slots to insert the new 45TB pack, one of the existing packs must be removed first. However, with the array at 80% usage, the data residing on the pack designated for removal (roughly half the raw capacity) cannot fit into the remaining free space of the other pack.
Therefore, Pure Storage Support will provision a DirectFlash Shelf (DFS) containing temporary capacity (e.g., a 63TB pack as mentioned in Option B). The Implementation Engineer attaches this shelf, adds it to the system, and utilizes it as a destination to evacuate data from the old 22TB pack. Once the old pack is empty and removed, the new 45TB pack is installed into the chassis. Finally, the data is moved from the temporary shelf back into the new chassis capacity, and the temporary shelf is disconnected and returned. Option A is incorrect because an empty shelf provides no storage to offload data, and Option C is operationally unfeasible for most customers.