Lenovo 4XH7A86758 SR655 V3 4X3.5 SAS M BP KIT

Lenovo 4XH7A86758 SR655 V3 4x3.5" SAS Backplane Kit

Overview

The Lenovo 4XH7A86758 is a SAS backplane kit designed to expand drive bay capacity in ThinkSystem SR655 V3 rack servers. This kit provisions four 3.5-inch large-form-factor drive slots, enabling additional SAS storage attachment directly to the server's storage controller — the right component when deploying or expanding direct-attached storage in an SR655 V3 chassis without adding an external storage enclosure. The 4XH7A86758 ships from Mexico (country of origin: MX) and weighs 10 lb, consistent with a full metal backplane assembly rather than a bare cable kit.

Compatibility

This backplane kit is designed specifically for the Lenovo ThinkSystem SR655 V3 server platform. It is not interchangeable with SR655 V1/V2 generations or other ThinkSystem series such as SR650 or SR630 — backplane connector routing and chassis bay geometry differ across generations. Confirm your chassis is the V3 revision before ordering. The SAS interface makes it compatible with SAS HDDs and SAS SSDs; it does not natively support NVMe drives, which require a separate NVMe backplane assembly. If your workload demands higher-density storage for NVR or video archive applications, verify that your SR655 V3 storage controller (HBA or RAID adapter) supports the additional SAS lanes this backplane exposes.

Installation Notes

Installing a backplane kit in a server storage bay requires powering down the system and grounding yourself against static discharge before handling the assembly. The backplane must be seated and secured to the chassis tray before connecting SAS signal cables and power connectors to the system board or storage controller. Refer to the SR655 V3 hardware maintenance manual for torque specifications on retention screws and the correct SAS cable routing path — improper routing can obstruct airflow and trigger thermal alerts. This is a factory-new genuine Lenovo component; no third-party firmware or driver installation is required beyond what the SR655 V3 platform already supports.