Lenovo 4XH7B03853 SR650 V4 4X3.5IN Sas/sata Rear BP KIT

Lenovo 4XH7B03853 SR650 V4 4x3.5-Inch SAS/SATA Rear Backplane Kit

Overview

The Lenovo 4XH7B03853 is a rear drive backplane expansion kit for the ThinkSystem SR650 V4 rack server, adding four 3.5-inch large-form-factor drive bays accessible from the rear of the chassis. For environments where the front bay count is fully committed to primary workloads — such as NVR-dense video surveillance deployments or storage-heavy compute nodes — this kit opens rear-accessible SAS or SATA capacity without displacing front drives. SAS and SATA dual-interface support means you can populate the bays with enterprise SAS HDDs for higher sustained throughput or cost-effective SATA nearline drives depending on workload priority. At 10 lb, the assembly is a substantial mechanical kit; plan rack access accordingly during installation.

Compatibility

Designed specifically for the Lenovo ThinkSystem SR650 V4 server platform. This kit is chassis-specific — it is not interchangeable with SR650 V2 or V3 variants, nor with other SR-series platforms such as the SR630 or SR850. Confirm the exact server generation before ordering. Compatible drive interfaces are SAS and SATA; NVMe drives are not supported by this backplane. If your SR650 V4 configuration is destined for a network video recorder or high-density surveillance storage role, pairing with enterprise nearline SATA or SAS HDDs sized for continuous-write workloads is the practical path. For PoE infrastructure supporting the camera side of that deployment, see PoE switches for switch-level planning.

Installation Notes

Installation requires rear-of-chassis access on a fully powered-down SR650 V4. The 10 lb weight of the kit reflects a multi-component mechanical assembly; two-person handling during installation is advisable to avoid flex damage to the backplane connector. Verify that your SR650 V4 has the corresponding rear drive cage slots unpopulated before ordering — some SR650 V4 configurations ship with rear bays blocked or pre-populated by alternative options. Consult the Lenovo SR650 V4 maintenance manual for torque specifications and connector seating confirmation steps before powering on.