Lenovo 4XH7B03850 SR650 V4 8X3.5IN Sas/sata +4NVME BP KIT

Lenovo 4XH7B03850 SR650 V4 8x3.5-in SAS/SATA + 4 NVMe Backplane Kit

Overview

The Lenovo 4XH7B03850 is a drive backplane kit designed for the ThinkSystem SR650 V4 rack server, adding a combined 8x 3.5-inch SAS/SATA drive bay configuration alongside 4 NVMe slots. If your SR650 V4 is deployed as a surveillance storage node, network video recorder back-end, or general-purpose storage server and you need to expand raw drive capacity without adding an external enclosure, this kit addresses that gap directly by populating the chassis with a higher-density front-bay backplane. The dual-interface design — SAS and SATA via 4XH7B03850 — means you are not locked into a single drive protocol, so existing SAS HDDs and SATA SSDs can coexist in the same server while the NVMe slots handle high-throughput workloads such as active video indexing or database caching. At 10 lb, this is a substantial mechanical assembly suited for data-center installation rather than field service.

Compatibility

This backplane kit is engineered specifically for the Lenovo ThinkSystem SR650 V4 server platform. It is not interchangeable with SR650 V2 or V3 chassis generations — connector placement, backplane form factor, and firmware signaling differ across generations. Before ordering, confirm your server's chassis model identifier matches the V4 generation. The kit supports SAS and SATA drive interfaces for the 3.5-inch bays and NVMe for the four additional slots; verify that your HBA or RAID adapter (sold separately) provides the corresponding SAS/SATA and NVMe connectivity — the backplane itself does not include a controller. For network video recorder and surveillance storage builds, pairing high-capacity 3.5-inch SAS nearline drives in the eight large bays with NVMe for the OS or write-cache tier is a practical configuration this kit enables.

Installation Notes

Installation is performed inside the SR650 V4 chassis with the server powered down and removed from the rack. The kit weighs 10 lb — two-person handling is advisable during chassis work to avoid dropping the assembly onto existing components. Country of origin is Mexico. Refer to the Lenovo ThinkSystem SR650 V4 Maintenance Manual for torque specifications, backplane connector seating procedures, and cable routing — installation details specific to this kit are documented there and are not reproduced here.