Lenovo 4B27A09320 ST650 V2 3.5 NVME 4-BAY BP

Lenovo 4B27A09320 ThinkSystem ST650 V2 3.5" NVMe 4-Bay Backplane

The Lenovo 4B27A09320 is a 3.5-inch NVMe 4-bay backplane designed specifically for the Lenovo ThinkSystem ST650 V2 tower server. If you're expanding or configuring NVMe-based storage in an ST650 V2, this backplane is the path to adding up to four 3.5-inch NVMe drives — connecting them directly to the system's NVMe fabric rather than routing through a legacy SAS/SATA controller. That distinction matters: NVMe's lower latency and higher throughput compared to SAS makes it the right architecture for workloads where storage I/O is the bottleneck.

Key Features

• NVMe Interface: Routes drive traffic over NVMe rather than SAS or SATA, delivering the full bandwidth ceiling that modern NVMe SSDs are capable of — relevant when the server handles database, virtualization, or analytics workloads where I/O wait time is measurable.
• 4-Bay 3.5-Inch Configuration: Four bays in the large-form-factor (3.5-inch) footprint supports high-capacity NVMe drives, letting you maximize usable storage per slot rather than trading capacity for the smaller 2.5-inch form factor.
• ST650 V2 Platform Fit: Engineered as a server storage component for the ST650 V2 specifically — not a universal backplane. Confirming platform compatibility before ordering prevents fitment issues during build-out.
• UNSPSC 43211600: Classified under computer storage devices, confirming this is a hardware infrastructure component, not a software or service SKU.

Integration and Compatibility

The 4B27A09320 is designed for the Lenovo ThinkSystem ST650 V2. Before ordering, confirm your ST650 V2 chassis configuration — bay count, existing backplane layout, and whether the system's NVMe connectivity supports this expansion. Lenovo's server accessories and components for the ST650 V2 family are platform-specific; mixing backplane generations or chassis variants can create compatibility gaps that aren't apparent until installation. Consult the ST650 V2 product guide for the exact supported backplane configurations and required cabling.

At 10 lb, this backplane ships at a weight consistent with a fully assembled drive cage assembly — plan accordingly for shipping and rack logistics. For storage planning guidance, review our storage infrastructure resources to pair the right drive types and quantities with this backplane.

Frequently Asked Questions

Q: What server is the 4B27A09320 compatible with?

A: The 4B27A09320 is a backplane designed for the Lenovo ThinkSystem ST650 V2 tower server. It is platform-specific and not a universal fit for other Lenovo server families.

Q: What drive interface does the 4B27A09320 support?

A: This backplane supports NVMe drives, not SAS or SATA. Ensure your ST650 V2 configuration includes NVMe connectivity before installing NVMe drives in this backplane.

Q: How many drives does the 4B27A09320 support?

A: The backplane supports up to four 3.5-inch NVMe drives.

Q: What does the 4B27A09320 weigh?

A: The 4B27A09320 weighs 10.00 lb as shipped.

Q: Is the 4B27A09320 a hot-swap backplane?

A: Hot-swap capability is not confirmed in the available evidence. Consult the Lenovo ThinkSystem ST650 V2 product guide or Lenovo's configuration tools for hot-swap support details specific to this backplane.

Karl Wilson

The 4B27A09320 is a platform-specific NVMe backplane for the ThinkSystem ST650 V2 — and that word "specific" is the one to anchor your procurement decision on. This isn't a generic backplane you can slot into any Lenovo tower; it's engineered for the ST650 V2 chassis bay layout and NVMe signal routing. Getting that wrong means a return shipment and a delayed build.

Technical Highlights:

• NVMe Interface: NVMe bypasses the SAS/SATA controller stack entirely, reducing I/O latency — relevant for ST650 V2 deployments running VM datastores or database workloads where storage response time is a measured KPI.
• 4-Bay 3.5" Capacity: Four large-form-factor slots let you populate the backplane with high-capacity NVMe drives, maximizing raw storage volume per backplane unit in the ST650 V2 chassis.
• 10 lb Shipping Weight: At 10 lb, this ships as a substantial assembly — factor that into any rack-and-stack logistics plan, particularly for multi-unit server builds where component staging matters.

Deployment Considerations:

• Verify your ST650 V2 chassis revision and existing backplane configuration against Lenovo's compatibility matrix before ordering — ST650 V2 bay configurations vary and not all chassis revisions support the same backplane combinations.
• NVMe backplanes require NVMe-capable host bus adapters or direct CPU PCIe lane connectivity; confirm the ST650 V2's HBA or PCIe configuration supports this backplane before specifying it in a build.

The 4B27A09320 is the right call for ST650 V2 builds where the workload justifies NVMe-tier storage and you need four 3.5-inch bays to hit capacity targets — particularly for on-premises virtualization hosts or local data-intensive applications where NVMe latency advantages are operationally significant.