Microchip Adaptec 12Gb/s SAS Expander Card

Unlock scalable storage with the Microchip Adaptec 12Gb/s SAS Expander Card. The 82885T SAS expander card offers a scalable connectivity / fan-out option for additional drives when used in conjunction with a SAS RAID adapter or SAS HBA. This device is designed to maximize drive density in servers and storage enclosures, delivering a reliable path to expand your storage footprint without sacrificing performance. Built for enterprise environments, the 82885T combines a compact MD2 low-profile form factor with robust SAS technology to help IT teams scale storage capacity efficiently and cost-effectively.

Whether you're expanding a growing data center, upgrading a storage array, or implementing a dense server chassis, this SAS expander provides a flexible solution for connecting more disks to your existing SAS controller. The card's architecture focuses on delivering high-speed 12Gb/s SAS connectivity, broad compatibility with SAS HBAs and RAID adapters, and a design that fits into standard rack and blade servers. With the 82885T, you gain a scalable path to more storage throughput, better data availability, and improved storage management across your enterprise.

• 36-port SAS/SATA expansion in a compact MD2 low-profile form factor, providing scalable connectivity and fan-out to add drives when paired with a compatible SAS RAID adapter or SAS HBA. This is ideal for dense storage configurations in servers and enclosures.
• Up to 20 internal ports for direct-attached drives, enabling high-density drive layouts within constrained chassis spaces while maintaining clean cable management and airflow.
• 12Gb/s SAS performance on each link, delivering strong throughput when connected to a capable SAS controller, SAS backplane, or storage enclosure, and maintaining compatibility with older SAS speeds as needed.
• Flexible expansion capabilities that support daisy-chaining and scalable growth of storage arrays, allowing you to extend capacity as your data grows without replacing the entire controller stack.
• Enterprise-grade reliability and compatibility, designed to work with a wide range of SAS RAID adapters and HBAs, supporting SAS and SATA devices and delivering a proven, field-tested expansion solution for data-center storage needs.

Technical Details of Microchip Adaptec 12Gb/s SAS Expander Card

• Model: 82885T SAS Expander Card
• Form factor: MD2 low-profile
• Port count: 36 total ports; up to 20 internal ports
• Data rate: 12Gb/s SAS per link; backward compatible with slower SAS interfaces
• Host interface: PCIe (typical implementation uses a PCIe x4 connection)
• Device support: SAS and SATA drives via standard SAS expander pathways
• Application: Expands connectivity for SAS RAID adapters and SAS HBAs to increase drive density in servers and storage enclosures

How to Install Microchip Adaptec 12Gb/s SAS Expander Card

• Power down the server, unplug it from power, and discharge any static electricity before handling internal components.
• Open the chassis and locate an available PCIe slot suitable for a low-profile MD2 card; remove the slot cover if necessary and ensure clearance for the expander's connectors.
• Insert the 82885T SAS Expander Card firmly into the PCIe slot and secure the card with the appropriate screw or mounting bracket to ensure a stable connection.
• Connect the SAS cables from your SAS RAID controller or HBA to the expander card according to your hardware configuration. Follow the controller’s documentation to attach the expander to the proper external or internal ports and route cables for optimal airflow and minimal cable clutter.
• Power on the server and install any required firmware updates or drivers from Microchip/Adaptec as guided by the operating system or RAID controller software. Verify that the expander is recognized by the host controller utility and that all connected drives are detected.
• Configure your storage environment using your RAID controller’s management software. Assign drives, verify link status, and ensure proper redundancy and performance settings for your array. Monitor the system for stable operation and confirm that all paths are functioning as expected.

Frequently Asked Questions

• Question: What is the primary purpose of the Adaptec 82885T SAS Expander?

  Answer: It provides scalable SAS/SATA expansion, enabling more drives to be connected to a SAS RAID controller or HBA. This expands drive density and connectivity in storage environments while preserving high-speed SAS performance.

• Question: How many drives can I connect with this expander?

  Answer: The design supports 36 ports in total, with up to 20 internal ports available for direct-attached drives, allowing substantial density in compact server and enclosure configurations.

• Question: Is SATA support included?

  Answer: Yes. The expander is designed to work with SAS and SATA devices through standard SAS expander pathways, enabling flexible use with a mix of SAS and SATA drives where supported by the host controller and backplane.

• Question: What host interface does this card use?

  Answer: The card interfaces with the host system via PCIe (typical implementations use a PCIe x4 connection), allowing compatibility with many server motherboards and storage controllers.

• Question: Do I need any special firmware or drivers?

  Answer: You may need firmware updates or drivers for your SAS controller or management software to ensure optimal performance and reliability. Always check Microchip/Adaptec support resources for the latest firmware, driver packages, and compatibility notes before deployment.