Lenovo ThinkSystem RAID 940-8i 4GB Flash RAID-controller 4Y37A09728, PCIe 4.0 x8, SAS/SATA 12 Gbit/s

The Lenovo 4Y37A09728 RAID controller is a PCI Express x8 adapter that supports both SAS and SATA drives with a maximum transfer rate of 12 Gbit/s. Based on the Broadcom SAS3908 chipset, this RAID controller supports multiple RAID levels including 0, 1, 5, 6, 10, 50, 60 and JBOD, offering flexible storage configuration options and improved data protection and performance for enterprise servers.

Advantages

The controller uses a dedicated RAID-on-Chip architecture that offloads RAID processing from the server CPU and provides hardware acceleration for parity operations. With support for high transfer rates and multiple RAID levels, it helps increase storage subsystem throughput and reliability. Its PCIe x8 host interface ensures compatibility with modern servers and a stable connection to the platform.

Suitable for

• Enterprise servers requiring hardware RAID and support for SAS/SATA drives
• Systems needing multiple RAID levels (0,1,5,6,10,50,60) and JBOD
• Storage configurations where 12 Gbit/s per-port throughput is required

Key specifications

• Model: Lenovo 4Y37A09728
• Host interface: PCI Express x8
• Chipset: Broadcom SAS3908
• Supported drive interfaces: SAS and SATA
• Data transfer rate: 12 Gbit/s
• Supported modes: RAID 0, 1, 5, 6, 10, 50, 60, JBOD
• Category: I/O adapters and controllers

How to use

Install the RAID controller into an available PCIe x8 slot on a compatible server motherboard, connect SAS or SATA drives to the controller's ports and configure the desired RAID level through the server BIOS/UEFI or the vendor's management utility. Ensure firmware and drivers from Lenovo are installed on the host operating system for full functionality and stability. Follow standard server maintenance procedures when adding or removing drives to avoid data loss.

Recommendations

Use this controller in enterprise environments with servers that support PCIe x8 slots and require hardware RAID acceleration; keep controller firmware and drivers up to date and implement regular backups before changing RAID configurations or replacing drives.