Supermicro BPN-SAS2-846EL1 Backplane - High-Density 24-Bay SAS/SATA

In this review of the Supermicro BPN-SAS2-846EL1 backplane, the bottom line is simple: it is built for system builders and datacenter technicians who need a reliable, high-density front-end to support large arrays of SAS or SATA drives. The reviewer found the backplane's core appeal to be its support for up to 24 drives in a 4U chassis footprint, which makes it a practical choice for storage-dense systems where rack space and predictable connectivity are priorities. For those replacing or upgrading server internals, this accessory delivers straightforward compatibility with enterprise LSI expanders.

Key Features

• 24-Bay Support: Supports up to 24 SAS or SATA drives, enabling dense storage configurations without expanding the chassis footprint.
• 4U Form Factor: Designed for a 4U chassis, providing a balance between capacity and rack height for standard server racks.
• LSI Expander Compatibility: Works with systems that use LSI expanders, allowing for broad compatibility with common RAID and HBA controllers.
• Enterprise Accessory: Sold as a Supermicro accessory, it fits workflow needs for shop repairs and upgrades where OEM parts are preferred.
• Direct Backplane Integration: Offers a clean drive backplane option that simplifies cable routing and drive servicing in multi-bay servers.

Who It's For

The BPN-SAS2-846EL1 is aimed at IT professionals, system integrators, and hobbyists building or repairing rackmount servers that require a compact, high-density backplane for mixed SAS and SATA drives. It suits environments where maximizing drive count per chassis is more important than hot-swap bay styling or additional integrated management features.

It is less suitable for users who need integrated RAID controllers, advanced management modules, or exact chassis-specific bezels and trays not indicated here. Customers seeking a full tower or consumer NAS with bundled software features should look elsewhere.

Pros & Cons

Pros

• High bay density lets you install up to 24 drives in a single 4U server, saving rack space.
• Compatibility with LSI expanders makes it easy to integrate with popular RAID and HBA setups.
• As an OEM accessory it fits Supermicro systems and simplifies parts replacement for repairs.

Cons

• Limited feature set as a backplane accessory; it does not include controllers or advanced management functions.

Specifications

Product	Backplane accessory
Model	Supermicro BPN-SAS2-846EL1
Drive Support	Up to 24 SAS/SATA drives
Chassis Size	4U
Compatibility	Designed for use with LSI expanders and Supermicro systems
Type	SASx36 backplane accessory

Our Verdict

The Supermicro BPN-SAS2-846EL1 is a practical, no-frills backplane for anyone needing dense drive capacity in a 4U server. It is good value for technicians and integrators who already plan to pair it with LSI expanders or controller cards, offering straightforward integration and dependable physical connectivity.

Frequently Asked Questions

Does this backplane support both SAS and SATA drives?
Yes, it supports up to 24 SAS or SATA drives, allowing mixed drive deployments.

Is a RAID controller included?
No, this is a backplane accessory and does not include a RAID controller or HBA; you must provide a compatible controller such as an LSI expander.

What chassis size is required?
The unit is designed for a 4U chassis, fitting systems that accept Supermicro 4U backplane accessories.