Micron RealSSD P320h and P420m PCIe SSDs
An early generation of enterprise PCIe solid-state drives that Micron sold under the RealSSD brand (P320h, P320m, P325m, P420h, P420m, P425m) between roughly 2011 and 2013. They plugged directly into PCIe slots in servers and predated the industry's standardization on NVMe, so they require their own dedicated driver instead of using the generic NVMe stack.
recommendation
Worth keeping but documenting its niche: the hardware was last marketed around 2013, Micron no longer lists it among current data-center SSDs, and any new deployment would use standard NVMe drives instead. However, the driver is still receiving small fixes upstream as recently as 2025 (patches from Oracle and Kylin developers in linux-block), suggesting some legacy enterprise systems are still running these cards and removal would be premature.
repository signals
sources
- lore.kernel.org
The driver still receives upstream attention in linux-block; a 2025 patch touched mtip32xx.
- lore.kernel.org
Another 2025 linux-block patch updated mtip32xx, indicating maintenance rather than abandonment or removal.
- investors.micron.com
Micron announced the RealSSD P320h in 2011, establishing this driver as support for an early-2010s PCIe SSD family.
- investors.micron.com
Micron announced the P420m in 2013, showing the supported hardware family was marketed in the early 2010s.
- micron.com
Micron's 2025/2026 current data-center SSD lineup lists modern NVMe products and does not list P320h/P420m-class devices, supporting that this hardware is no longer sold new.
codex reasoning notes (technical)
Local `rg` on the source tree identified the device family as Micron RealSSD PCIe SSDs (P320H/P320M/P320S/P325M/P420H/P420M/P425M). lore evidence came from MCP `lore_file_timeline` on `drivers/block/mtip32xx/mtip32xx.c`, which showed recent 2025 activity; I cite two exact lore patch URLs surfaced there. Micron launch history and present-day product lineup came from web search results on Micron investor/product pages. No removal/deprecation thread was found in the limited lore budget; combined with recent fixes, that argues against deprecate/remove. Hardware appears obsolete and replaced in new deployments by standard NVMe SSDs, but legacy enterprise systems may still exist, so `keep-annotate` fits best.