Lenovo 4M17A80604 ST250 3.5 S&S 4-BAY BP KIT (X40) V2

Lenovo 4M17A80604 ST250 3.5-Inch Simple-Swap 4-Bay Backplane Kit

Overview

The Lenovo 4M17A80604 is a 3.5-inch simple-swap 4-bay backplane kit (X40, V2) for the ThinkSystem ST250 tower server. It is a direct hardware expansion component — not a cable adapter or software license — designed for integrators who need to add or replace the simple-swap drive bay assembly in an ST250 chassis. At 4.75 lb and 16.30 × 13.50 × 7.10 inches, this is a full backplane assembly sized to fit the ST250's internal bay envelope, meaning it ships ready to seat without cutting or fabrication.

Compatibility

The 4M17A80604 is purpose-built for the Lenovo ThinkSystem ST250 tower server (V2 generation). The X40 designation indicates this kit supports up to four 3.5-inch simple-swap drives — SATA HDDs or SSDs compatible with the ST250's simple-swap bays. It is not interchangeable with hot-swap backplane kits, nor is it validated for the ST550, ST558, or ST650 V2 form factors. Confirm your ST250 chassis revision before ordering: this is a V2-specific assembly and may not align mechanically with first-generation ST250 units. For server storage accessories requiring hot-swap capability, a separate hot-swap backplane option exists in the ST250 accessory line.

Installation Notes

Simple-swap backplanes require the server to be powered down before drives are inserted or removed — there is no live-swap capability. Ensure the ST250 chassis is de-energized and grounded before seating the backplane assembly. The 16.30 × 13.50 × 7.10 in footprint is consistent with a full bay assembly; verify clearance within the chassis before installation if other internal components (cable managers, riser cards) have been added. No additional tools or mounting hardware are documented in available evidence beyond what is standard for ST250 chassis service procedures.