Lenovo 4XF7B08890 SR850 V4/SR860 V4 E3.S Chassis CMA

Lenovo 4XF7B08890 SR850 V4 / SR860 V4 E3.S Chassis Cable Management Arm

Overview

The Lenovo 4XF7B08890 is an E3.S chassis cable management arm (CMA) engineered specifically for the Lenovo ThinkSystem SR850 V4 and SR860 V4 server platforms. If you are building or expanding a high-density rack server deployment and need to maintain clean, serviceable cable routing behind your 4U or 4-socket nodes, this is the factory-designated CMA for those chassis — not a universal fit, not an aftermarket approximation. At 10.00 lb, it is built with the mechanical heft required to manage the cable loads typical of a fully configured SR850 V4 or SR860 V4, including storage, networking, and power runs in a demanding data center or server room environment.

Key Features

• Platform-Specific Fit: Designed exclusively for the SR850 V4 and SR860 V4 chassis. Using a generic CMA on these platforms risks cable strain, improper clearance during slide-out maintenance, and voiding rack integration support — this part eliminates that risk by design.
• E3.S Chassis Variant: The E3.S designation indicates this CMA is matched to the E3.S drive bay chassis configuration of the SR850 V4 / SR860 V4, which differs mechanically from NVMe U.2 or 2.5-inch SAS/SATA variants. Verify your chassis sub-type before ordering.
• 10 lb Structural Rating: At 10.00 lb, this arm is built for the cable densities of a fully-loaded 4-socket enterprise node — not a lightweight 1U CMA repurposed for a heavy platform. That weight reflects real aluminum/steel construction capable of managing thick power and data bundles without sag or stress points.
• Manufactured in Mexico: Country of origin MX under Lenovo's manufacturing infrastructure, consistent with supply chain traceability requirements common in government and regulated enterprise environments.

Integration & Compatibility

The 4XF7B08890 is validated for use with the Lenovo ThinkSystem SR850 V4 and SR860 V4 only. It is not cross-compatible with SR650, SR630, or other ThinkSystem chassis lines. If you are deploying a mixed rack with multiple server models, confirm the specific CMA part number for each chassis type. Consult the server accessories compatibility matrix or Lenovo's Hardware Maintenance Manual for the SR850 V4 / SR860 V4 before finalizing your rack management bill of materials.

Frequently Asked Questions

Q: Which server platforms is the 4XF7B08890 compatible with?

A: The 4XF7B08890 is designed specifically for the Lenovo ThinkSystem SR850 V4 and SR860 V4 with the E3.S chassis configuration. It is not validated for other ThinkSystem models.

Q: What does the E3.S designation mean for this CMA?

A: E3.S refers to the specific drive bay chassis variant of the SR850 V4 / SR860 V4. The mechanical mounting points and cable routing path differ between E3.S, U.2, and 2.5-inch SAS/SATA chassis versions. Confirm your chassis sub-type before ordering.

Q: What is the weight of the 4XF7B08890?

A: The 4XF7B08890 weighs 10.00 lb, reflecting the structural construction required for the cable loads of a fully configured SR850 V4 or SR860 V4.

Q: Is this CMA available as a field upgrade or only factory-installed?

A: Based on available evidence, the 4XF7B08890 is a Lenovo option part available for field installation on compatible SR850 V4 / SR860 V4 chassis. Refer to Lenovo's installation documentation for mounting procedure details.

Q: Where is the 4XF7B08890 manufactured?

A: Country of origin is Mexico (MX), consistent with Lenovo's ThinkSystem accessory manufacturing.

Eden Phillips

The 4XF7B08890 is one of those parts that looks like a line-item afterthought until the day your SR850 V4 cable bundle catches on the rack rail during a hot-swap and pulls a connector. At 10.00 lb, this CMA is engineered for the actual cable density of a fully configured 4-socket node — not a repackaged 1U accessory bolted onto a chassis it was never rated for.

Technical Highlights:

• Platform Exclusivity: Validated only for SR850 V4 and SR860 V4 with E3.S chassis — the mounting geometry is chassis-specific, meaning a universal CMA will not align correctly to the slide and cable egress points on these platforms.
• 10 lb Build Weight: Reflects real structural material — aluminum/steel construction rated for the power, storage, and networking cable loads typical of a populated SR850 V4 or SR860 V4, where cable count and diameter exceed a standard 2-socket node by a significant margin.
• Mexico Origin (MX): Manufactured under Lenovo's tracked supply chain, relevant for procurement teams with country-of-origin documentation requirements in government or regulated environments.

Deployment Considerations:

• Verify the chassis sub-type — the E3.S variant has different mechanical mounting than the U.2 NVMe or 2.5-inch SAS/SATA configurations. Ordering the wrong CMA variant for your chassis sub-type means it will not mount correctly.
• Evidence for this SKU is limited to distribution feed attributes; confirm final installation torque specs and cable capacity ratings via Lenovo's SR850 V4 / SR860 V4 Hardware Maintenance Manual before deployment.

The 4XF7B08890 belongs in a rack build where the SR850 V4 or SR860 V4 will see regular maintenance access — AI inference nodes, high-core-count database servers, or HPC clusters where cable discipline directly affects mean time to service a drive or DIMM without a full cable re-dress.