Purity Safety Mechanism: In Pure Storage Purity, volume resizing-specifically downsizing-is a destructive operation because it can lead to data truncation. To protect against human error (like the one described in the scenario), Purity automatically creates a "pre-resize" snapshot of the volume before the change is committed.
The "Destroyed" Snapshot: When a volume is shrunk, Purity generates a snapshot of the volume in its state immediately before the shrink operation. This snapshot is placed in the Destroyed (or "Pending Eradication") bucket.
Recovery Process: To recover the data, the administrator does not simply "resize back up" (Option C), as the data beyond the 1GB mark may have already been unmapped or treated as truncated by the host file system. Instead, the administrator should locate the auto-generated snapshot in the Destroyed volumes/snapshots section, "recover" it to make it active again, and then either copy that snapshot to a new volume or overwrite the truncated volume from that snapshot.
SafeMode Integration: If SafeMode is enabled, these auto-generated snapshots are even more secure, as they cannot be manually eradicated before the timer expires, ensuring a guaranteed recovery point for accidental shrinks.
Why Option C is incorrect: Increasing the size of a volume back to 1TB (or 1PB) does not automatically restore the data that was logically removed or truncated when the volume was set to 1GB; the host file system would still see the data as corrupted or missing.