When expanding capacity on a Pure Storage FlashArray, it is critical to understand the distinction between normal drive insertion states and hardware fault states. As established in previous deployment steps, when a standard, supported DirectFlash Module (DFM) is inserted into a healthy array, it typically enters an
"unadmitted" state. This means the hardware is fully recognized, but the system is securely waiting for the administrator to manually claim the drives using puredrive admit.
However, if an Implementation Engineer inserts a new data pack and the puredrive list command reports the status strictly as "unrecognized," this indicates a deeper software-to-hardware mismatch.
The Purity//FA operating system relies on an internal hardware dictionary (including specific drivers and firmware profiles) to communicate with the custom NVMe flash modules. If a customer purchases a newly released, next-generation DFM (for example, a higher-density QLC drive or a newly manufactured DFM with an updated internal NAND controller), an older version of Purity simply will not know how to interact with it.
Because the older OS lacks the required hardware definitions, it flags the drive as "unrecognized." To resolve this issue and proceed with the capacity expansion, the Implementation Engineer must first perform a non- disruptive upgrade of the Purity operating system to a version that officially supports the new drive's Bill of Materials (BOM).