Lenovo 4Y37A90063 ThinkSystem M.2 RAID B540i-2i Adapter

Lenovo 4Y37A90063 ThinkSystem M.2 RAID B540i-2i Adapter

Overview

The Lenovo 4Y37A90063 is a ThinkSystem M.2 RAID B540i-2i adapter, a specialized enterprise server storage controller designed to enable M.2 SSD support and RAID functionality in Lenovo ThinkSystem servers.

This is not a consumer device—it is a PCIe plug-in card used in data center and enterprise environments to manage internal storage efficiently.

The adapter supports both SATA and NVMe M.2 SSDs, allowing flexible storage configurations for operating system boot drives or high-speed storage tiers. It connects via a PCIe 4.0 x2 interface, ensuring fast data throughput for modern server workloads.

A key feature is RAID support (0, 1, JBOD), enabling redundancy or performance optimization depending on deployment needs. This makes it ideal for enterprise scenarios requiring data protection or mirrored boot drives.

The adapter provides two M.2 slots and two internal SATA ports, supporting dual-drive configurations within compatible ThinkSystem servers.

It is commonly deployed in servers such as ThinkSystem SR650 V3, SR630 V3, and related platforms, where it enables compact, high-speed storage without consuming standard drive bays.

Key Features

• Supports 2× M.2 SSDs (SATA or NVMe)
• RAID support: 0, 1, JBOD for flexibility and redundancy
• PCIe 4.0 x2 interface for high-speed connectivity
• Designed for ThinkSystem enterprise servers
• Ideal for boot drives or compact storage expansion

Specifications