Example tiered storage systems, storage devices, and methods provide tier configuration by peer storage devices. Each tiered storage device is configured to communicate with a plurality of peer storage devices with storage device identifiers. The storage devices may query each other for performance characteristics and/or self-assigned performance tiers and organize the storage devices into a tier configuration. Each storage device, a storage controller, another system, and/or some combination may store metadata that describes the tier configuration. The tier configuration may then be used to route host data commands among the plurality of peer storage devices.