Lenovo 4M17A80523 ST250 2.5 Sata/sas 8-BAY BP KIT V2

Lenovo 4M17A80523 ST250 2.5-Inch SAS/SATA 8-Bay Backplane Kit V2

Overview

The Lenovo 4M17A80523 is a second-generation 8-bay 2.5-inch backplane kit designed for the ThinkSystem ST250 tower server. It provides the physical drive-bay infrastructure needed to expand or replace the storage backplane in ST250 deployments, supporting both SAS and SATA drive interfaces — so you can mix spinning-disk and SSD storage tiers within the same backplane without swapping hardware. At 2.00 lb, it installs directly into the ST250 chassis without structural modification.

Compatibility

Designed for the Lenovo ThinkSystem ST250 tower server. Supports 2.5-inch SAS and SATA drives — including HDDs and SSDs in that form factor. The V2 designation distinguishes this from the first-generation backplane; verify your ST250 chassis revision before ordering, as V1 and V2 backplanes are not interchangeable. This kit is not compatible with 3.5-inch large-form-factor drives or with other ThinkSystem tower models such as the ST550 or ST650.

Installation Notes

Installation requires partial disassembly of the ST250 chassis to access the drive cage. Confirm your server's chassis revision matches the V2 specification before procurement — installing a mismatched backplane generation can prevent proper drive detection. SAS and SATA signal and power connectors must be routed from the system board or HBA to the backplane headers; consult the ThinkSystem ST250 maintenance manual for connector pinouts and cable routing. This is a factory-new server storage accessory sourced through standard distribution channels.