Lenovo 4M17A80606 ST250 3.5 Sata/sas 4-BAY BP KIT (X40)

Lenovo 4M17A80606 ST250 3.5-Inch 4-Bay SATA/SAS Backplane Kit

Overview

The Lenovo 4M17A80606 is a 4-bay 3.5-inch drive backplane kit (X40) designed for the ThinkSystem ST250 tower server. If you're expanding raw storage capacity in an ST250 deployment — whether for network video recorders, file servers, or edge compute nodes — this backplane kit is the hardware that makes hot-swap SATA or SAS drive bays possible. Without it, the ST250 has no mechanism to mount and connect 3.5-inch drives in a managed, field-serviceable way. The 4M17A80606 weighs 10 lb, reflecting the full assembly including backplane PCB, drive tray hardware, and mounting infrastructure. Both SAS and SATA interfaces are supported, giving you flexibility to deploy SAS drives for write-intensive workloads or SATA for cost-effective bulk storage — without changing the backplane.

Compatibility

This kit is designed specifically for the Lenovo ThinkSystem ST250 tower server. It is not a universal backplane — do not attempt to install it in ST50, ST550, or other ThinkSystem chassis variants, as physical mounting points and signal routing differ across platforms. The X40 designation indicates this is the 4-bay configuration; if your ST250 deployment requires more than four 3.5-inch drives, verify whether your chassis supports additional backplane slots before ordering. SAS connectivity requires a compatible SAS HBA or RAID adapter already installed in the ST250 — the backplane alone does not provide SAS controller functionality. SATA drives connect directly through the system board's SATA ports, subject to port availability. For surveillance-optimized storage drives, confirm drive compatibility against Lenovo's ST250 ServerProven list before procurement.

Installation Notes

Installation is a field-serviceable procedure within the ST250 chassis. The kit ships at 10 lb — account for that weight when planning rack or tower placement and verifying that the ST250 is powered down and properly grounded before backplane work. SAS/SATA signal cables between the backplane and the system board or HBA must be routed and secured to avoid contact with moving components. Lenovo's ST250 maintenance documentation should be consulted for torque specifications and cable routing diagrams specific to this chassis revision before installation.