Lenovo 4C57A15016 SR850 V2 2.5 Inch NVME BP

Lenovo 4C57A15016 SR850 V2 2.5-Inch NVMe Backplane

The Lenovo 4C57A15016 is a 2.5-inch NVMe backplane designed for the ThinkSystem SR850 V2 rack server — a purpose-built storage expansion component that wires additional NVMe drive bays directly into the SR850 V2 chassis without an intermediary SAS/SATA controller, keeping latency low and throughput at the NVMe bus ceiling. If you're expanding storage density on an existing SR850 V2 or configuring a fresh build for a latency-sensitive workload such as a high-channel video archive, database tier, or AI inference node, this backplane is the correct OEM part for that chassis.

Key Features

• NVMe Interface: Routing drives over NVMe rather than SAS or SATA eliminates the protocol translation layer, so drive read/write speeds reach the PCIe bus ceiling rather than being capped by a legacy controller. For high-ingest workloads — continuous 24/7 video streams from dozens of cameras, or real-time analytics pipelines — this is a meaningful architectural advantage over SAS backplanes.
• 2.5-Inch Drive Form Factor: The 2.5-inch bay format supports the broadest range of enterprise NVMe SSDs available today, giving you flexibility to select drives by endurance rating, capacity, or vendor without being constrained to a rarer 3.5-inch NVMe form factor.
• SR850 V2 Platform Fit: The 4C57A15016 is built to the mechanical and electrical specifications of the ThinkSystem SR850 V2 chassis. Using the correct OEM backplane — rather than a generic or cross-model substitute — preserves server firmware compatibility and avoids drive detection issues that can surface during POST or under mixed-load conditions.
• Documented Weight — 60 lb: At 60 lb, this component ships as a substantial chassis-level part. Plan rack staging and installation with two-person lift procedures; do not attempt solo installation into an elevated rack position.

Integration and Compatibility

The 4C57A15016 is documented under UNSPSC code 43211600 (data storage and computer equipment). It is intended exclusively for the Lenovo ThinkSystem SR850 V2 platform. Before ordering, confirm your SR850 V2 chassis revision and existing backplane configuration against the Lenovo server catalog to ensure this backplane aligns with your chassis slot and cabling layout. Pairing this backplane with compatible enterprise storage infrastructure and the appropriate NVMe SSDs from the Lenovo SR850 V2 compatibility matrix will yield the best platform stability. If you are building or expanding a high-density server storage configuration, confirm drive bay totals and PCIe lane allocation with your platform documentation before procurement.

Frequently Asked Questions

Q: Which server platform is the Lenovo 4C57A15016 designed for?

A: The 4C57A15016 is a backplane component designed for the Lenovo ThinkSystem SR850 V2 rack server. It is not a universal or cross-platform backplane — use it only in the SR850 V2 chassis to ensure mechanical fit and firmware compatibility.

Q: What drive interface does the 4C57A15016 support?

A: This backplane uses NVMe as its drive interface, routing drives directly over PCIe rather than through a SAS or SATA controller. This provides lower latency and higher throughput than legacy storage backplane protocols.

Q: What drive size does the 4C57A15016 accommodate?

A: The backplane is designed for 2.5-inch form factor drives, which aligns with the mainstream enterprise NVMe SSD market.

Q: How much does the 4C57A15016 weigh, and are there installation considerations?

A: The unit weighs 60 lb. This is a substantial chassis-level component — follow two-person lift procedures and ensure rack position and rail stability are confirmed before installation.

Q: Is the 4C57A15016 a genuine Lenovo part?

A: Yes. This is a factory-new, genuine Lenovo component sourced through distribution channels with no grey-market or parallel-import exposure.

Ted Perry

The 4C57A15016 is a platform-specific NVMe backplane for the ThinkSystem SR850 V2 — and the detail that matters most here is the interface choice: NVMe over PCIe means you're not bottlenecked by a legacy storage controller when drives are capable of far more. For any SR850 V2 deployment running storage-intensive workloads, this is the backplane that keeps the drive subsystem from becoming the constraint.

Technical Highlights:

• NVMe Interface: PCIe-direct connectivity removes the SAS/SATA translation overhead — drives operate at bus speeds, not controller-limited speeds. Relevant whenever sequential throughput or IOPS ceilings are a design factor.
• 2.5-Inch Bay Format: Aligns with the widest selection of enterprise NVMe SSDs currently shipping, so drive vendor and capacity decisions aren't constrained by form factor availability.
• 60 lb Shipping Weight: This is a chassis-level component with meaningful physical mass — not a drive tray. Factor handling weight into your rack staging workflow and ensure a second person is available for installation.

Deployment Considerations:

• Verify your specific SR850 V2 chassis revision and existing backplane slot configuration before ordering — the SR850 V2 supports multiple backplane configurations and not all are interchangeable.
• Cross-reference your NVMe drive selections against Lenovo's SR850 V2 compatibility matrix; installing drives not on the validated list can cause intermittent detection failures under load, particularly in mixed-drive configurations.

For high-channel video surveillance archive builds or AI inference nodes running on the SR850 V2 platform, the 4C57A15016 is the correct storage backplane to specify when NVMe density and bus-direct throughput are the design requirements — not a workaround, the intended component.