Lenovo 4M17A80601 SR250 4X3.5 SS HBA_BP BKT X40 KIT

Lenovo 4M17A80601 SR250 4x3.5 HBA Backplane Bracket Kit

Overview

The Lenovo 4M17A80601 is a mechanical bracket kit designed to install a 4x3.5-inch simple-swap HBA backplane into the ThinkSystem SR250 server platform with an X40 drive configuration. If you're expanding storage density on an SR250 — or replacing a damaged bracket assembly during a field repair — this is the OEM part that maintains proper backplane alignment and drive bay integrity. Having the correct bracket matters: misaligned backplanes create intermittent SAS/SATA signal errors that are difficult to diagnose under load.

Compatibility

Designed for the Lenovo ThinkSystem SR250 1U rack server in a 4x3.5-inch simple-swap drive bay configuration paired with an X40 HBA. Verify your SR250 chassis generation and storage bay configuration before ordering — the SR250 supports multiple storage backplane configurations (2.5-inch and 3.5-inch variants), and bracket geometry differs between them. This kit is specific to the 4x3.5-inch simple-swap (SS) HBA backplane topology; it is not interchangeable with hot-swap (HS) or 2.5-inch backplane bracket kits for the same chassis. If you are configuring a network video recorder or storage server for a surveillance deployment, confirm the SR250 storage SKU against Lenovo's SR250 configuration guide before adding this bracket to your build.

Installation Notes

This bracket kit is a mechanical assembly component — installation requires partial disassembly of the SR250 chassis to seat and secure the backplane bracket. Use Lenovo's SR250 hardware maintenance manual torque specifications for all chassis fasteners; over-torquing sheet-metal standoffs in 1U enclosures can strip threads and compromise grounding continuity. Ensure the HBA card and backplane signal/power cables are fully disconnected before repositioning the bracket. No special tooling beyond a standard Torx/Phillips set is required, but confirm screw sizes against the SR250 service guide before disassembly.