The LENOVO ThinkSystem ST550 2.5" SATA/SAS 4-Bay Backplane Kit is a professional-grade upgrade option designed specifically for Lenovo's ThinkSystem ST550 server. This kit converts the existing 5.25-inch media bays into a 4-bay 2.5-inch SATA/SAS hot-swap capable backplane, enabling the installation of up to four high-performance 2.5" drives.

Included in the package are the backplane assembly, a 4x2.5" HDD cage, power and signal cables for seamless integration, HDD filler pieces to maintain airflow and aesthetics, and HDD sequence labels to assist with drive management.

The kit requires connection to a separate RAID controller or Host Bus Adapter (HBA) to function, which is not included. Installation is supported by Lenovo’s detailed service documentation, providing step-by-step guidance and safety recommendations. Note that installation may require adding a front mid-fan (Fan 3) to maintain optimal cooling, which must be purchased separately if not already installed.

This backplane kit is an essential expansion accessory for enhancing storage flexibility and scalability within Lenovo ThinkSystem ST550 environments, designed to meet enterprise-grade reliability and performance standards.