Lenovo 4M27A39661 Thinksystem SN550 V2 Nvme/sata BP

Lenovo 4M27A39661 ThinkSystem SN550 V2 NVMe/SATA Backplane

Overview

The Lenovo 4M27A39661 is a storage backplane designed for the ThinkSystem SN550 V2 blade server, supporting both NVMe and SATA drive interfaces. If your SN550 V2 blade deployment needs direct-attached storage — whether for local boot, caching, or high-throughput workloads — this backplane is the hardware-level prerequisite. At 10 lb, it is a substantive assembly, not a cable adapter; expect a deliberate installation process within the blade chassis.

The dual-interface design (NVMe and SATA) is the defining characteristic here. NVMe support means the backplane can feed PCIe-attached SSDs directly, bypassing the latency overhead of legacy storage controllers — relevant when the SN550 V2 is running latency-sensitive workloads such as databases, VMs with high IOPS demands, or edge inference tasks. SATA support broadens drive selection to include lower-cost SATA SSDs or HDDs where raw throughput is less critical than capacity per dollar. Having both interfaces on a single backplane gives the installer flexibility to mix drive types in a single blade without sourcing separate hardware.

UNSPSC code 43211600 classifies this as a computer storage device — consistent with a drive backplane assembly. Verify compatibility with Lenovo's server storage components catalog and the specific SN550 V2 chassis revision before ordering, as blade backplane revisions are chassis-dependent and not interchangeable across generations.

Key Features

• NVMe Interface Support: Enables PCIe-attached NVMe SSDs in the SN550 V2 blade — critical for workloads where storage latency directly affects application performance. NVMe drives on this backplane bypass legacy controller bottlenecks entirely.
• SATA Interface Support: Broadens your drive selection to SATA SSDs and HDDs, letting you balance cost against performance within the same blade. Useful when capacity density matters more than peak IOPS.
• Dual-Protocol Design: A single backplane handling both NVMe and SATA eliminates the need for separate backplane SKUs per drive type — simplifies spare-parts management in mixed-storage blade environments.
• 10 lb Assembly Weight: The 10 lb weight indicates a full backplane assembly (not a riser or adapter card). Plan for standard blade disassembly procedures and appropriate ESD precautions during installation.

Integration and Compatibility

The 4M27A39661 is designed specifically for the ThinkSystem SN550 V2 blade platform. Before procurement, confirm the target chassis revision and any firmware dependencies with Lenovo's compatibility matrix. This backplane is a direct replacement or upgrade path for SN550 V2 blades requiring NVMe capability — not a fit for earlier SN550 (V1) or other ThinkSystem blade families. For broader blade server storage planning, verify that your blade chassis midplane and I/O modules support the NVMe lanes this backplane exposes.

Frequently Asked Questions

Q: What drive interfaces does the Lenovo 4M27A39661 support?

A: The 4M27A39661 supports both NVMe and SATA drive interfaces, allowing installation of PCIe-attached NVMe SSDs and SATA-based drives within the ThinkSystem SN550 V2 blade.

Q: Which server platform is the 4M27A39661 compatible with?

A: This backplane is designed for the Lenovo ThinkSystem SN550 V2 blade server. It is not confirmed compatible with the original SN550 (V1) or other ThinkSystem blade families — verify against Lenovo's official compatibility matrix before ordering.

Q: How much does the 4M27A39661 weigh?

A: The assembly weighs 10 lb, indicating a full backplane module. Factor this into blade handling and installation planning.

Q: Is the 4M27A39661 a hot-swap component?

A: Hot-swap capability is not confirmed in available evidence. Consult Lenovo's ThinkSystem SN550 V2 maintenance documentation to confirm whether this backplane can be replaced with the blade powered on.

Q: What is the UNSPSC code for the 4M27A39661?

A: The UNSPSC code is 43211600, classifying it as a computer storage device.

James Everett

The 4M27A39661 is a purpose-built backplane for the ThinkSystem SN550 V2 blade — the part that determines whether your blade can run NVMe storage at all. At 10 lb, this is a full backplane assembly, and the dual NVMe/SATA interface support is the core spec worth understanding before you order.

Technical Highlights:

• NVMe Interface: PCIe-direct storage access in the SN550 V2 blade — the latency gap between NVMe and SATA is typically 5–10x in random read IOPS, which matters if this blade is hosting VMs or database workloads.
• SATA Interface: Retains compatibility with SATA SSDs and HDDs, giving you a cost-effective option for boot drives or bulk capacity where NVMe speeds aren't required.
• 10 lb Assembly: Full backplane weight signals this is a structural chassis component, not a lightweight adapter — installation requires full blade extraction from the chassis enclosure.

Deployment Considerations:

• Confirm the exact SN550 V2 chassis revision before procuring — Lenovo blade backplanes are revision-specific, and a mismatch means the part will not physically seat or electrically connect correctly.
• Available evidence does not confirm hot-swap support; assume cold-maintenance procedures are required unless Lenovo's SN550 V2 service documentation explicitly states otherwise.

Best fit: SN550 V2 blade deployments being upgraded from SATA-only storage to NVMe-capable configurations — particularly where the existing backplane predates NVMe support and the workload profile (high-IOPS VMs, latency-sensitive databases) justifies the upgrade over a SATA-only replacement part.