The FlashArray//X, running the Purity//FA operating environment (version 6.0 and later), provides native, unified file and block services. This allows the customer to serve both workload types from the same array and the same global storage pool. Since the customer has 40 TB of available capacity, which is more than sufficient for the new 10 TB file workload, they can simply enable and configure file services on their existing hardware. This approach requires no additional hardware purchase, making it the most cost-effective solution and directly addressing the customer's primary constraint to spend the least amount possible.

B. FlashArray architecture is built on a single, global storage pool for all data; it does not support the creation of separate disk pools.

C. Purchasing a new FlashBlade appliance is a significant capital expenditure and is unnecessary when the existing array has the capacity and capability.

D. A Non-Disruptive Upgrade (NDU) to a larger model is a costly hardware change that is not required as the current array has ample capacity.

1. Pure Storage Documentation, "Purity//FA File Services Overview": This document states, "Purity File Services extends the industry-leading simplicity and performance of FlashArray to file-based workloads... It provides a unified storage experience, allowing you to run both block and file workloads on the same array." This confirms the technical feasibility of the recommended solution. (Reference available via Pure Storage support portal).

2. Pure Storage White Paper, "FlashArray Architecture": Section "Purity Data Services" describes how Purity provides a rich set of data services, including protocol services for block (iSCSI, FC) and file (NFS, SMB), which operate on a single, global pool of flash storage. This architecture makes the concept of adding a separate disk pool (Option B) invalid.

3. Pure Storage Data Sheet, "FlashArray//X Family": The data sheet specifies that the Purity//FA software provides "Unified Block & File" capabilities, confirming that the hardware platform is designed for this mixed-workload scenario. This supports using the existing array (Option A) over purchasing a new one (Options C and D).