ATTO Celerity™ Fibre Channel host bus adapters deliver the fastest data throughput available for today's most demanding storage environments.

Trusted by Fortune 1000 companies to deliver their data, we focus on delivering the lowest latency solutions for today’s modern workflows, including: physical and virtual datacenters, unstructured data environments, streaming and backup services, disaster recovery, Mac Pro® infrastructures, rich content delivery, and server clustering.


Engineered to give you the edge

Celerity HBAs are engineered differently and have an advantage over the leading competitor embedded directly in the processor's architecture. Every element of the design is selected for quality and speed. We start with a multi-core Fibre Channel ASIC supporting multiple dynamic data threads to provide incredible performance in keeping data flow at optimum levels.  Adding our intelligent software driver stack further enhances our Celerity Fibre Channel HBAs by tuning to best optimize the data flow for your data patterns.  It is no wonder that our HBAs are half the latency of our closest competitor and users continuously turn to ATTO to get the most out of their Fibre Channel infrastructure.

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Architect the modern datacenter

Storage architects who demand extreme and reliable performance consistently turn to ATTO. Celerity HBAs unleash the performance of all-flash data centers with the support of NVMe fabric technology for demanding workloads that require extreme performance, ultra-low latency, and storage persistency to shared storage resources.

Custom connectivity

Available in low-profile single-, dual-, and quad-port versions, ATTO Celerity HBAs are backward compatible, reducing the complexity of deploying and managing the SAN, and take full advantage of advancements for reliability and forward error correction to improve network performance and resiliency. ATTO HBAs support a wide breadth of operating systems for the most flexibility including Windows®, Linux®, illumos, FreeBSD, VMware and macOS®.


Connect your workstation to enterprise storage

ATTO Celerity HBAs, featuring Multipath Director™ technology, are the only solution that allows direct connectivity to enterprise storage not just for servers, but also workstations. They provide load balancing and path failover protection to improve overall Fibre Channel SAN efficiency with consistent uninterrupted access to your data.



Reliable performance is our specialty

Move large volumes of data with fast, predicable and deterministic response time by optimizing performance up to 3200MB/s per channel and support for PCIe 4.0. Built into every Celerity HBA, ATTO Advanced Data Streaming (ADS™) technology manages latency by providing controlled acceleration for smooth data streaming and allows you to maintain the highest consistent performance in data intensive environments.

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ADS Competitor lacks quality performance.
ADS has premium levels of consistent performance.

Let's look ahead together

ATTO Celerity HBAs are built to handle the scalability and availability needs for the evolution of data processing. Artificial intelligence and machine learning are changing the word and used to process unstructured data including satellite imagery, oil and gas exploration and digital surveillance.  ATTO is ready to be your partner to handle data flow and management requirements to analyze and process the data needs of the future.

Develop Unique, Quick to Market Solutions

ATTO Target Mode SDK gives developers complete control and flexibility in creating custom capabilities that differentiate their products without tying up internal resources and yet can be simplified enough to push product out to market quickly.

The custom ATTO Target Mode Driver interface unlocks programming and fine-tuning flexibility for virtually unlimited performance possibilities. With this, developers can elevate their product well above the competition and stand out as a performance leader.  By custom crafting drivers for your storage solution, you are in complete control of performance specifications, compatibility, and integration.  ATTO Target Mode Drivers offer developers:

Improved API between HBA driver and target mode for increased stability and reliability

  • Task management improvements
  • Able to better handle errors which may occur

Better communication between our HBA driver and target mode

  • Performance improvements
  • Improved use of processors, concurrent IO of our driver, utilize greater resource pools
  • Support multiple queues as opposed to single threaded solution
  • Common Code across protocols makes it easy to implement for Fibre Channel solutions


High compatibility and broad interoperability

We are constantly testing and certifying our products with third-party vendors, from OS and servers to switches and storage, to ensure the widest range of compatibility. ATTO works closely with tier one industry leaders to ensure certified interoperability allowing you to deploy robust storage area network (SAN) infrastructures with proven best practices.

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Celerity™ FC - 32Gb/s Gen 7 Fibre Channel Host Bus Adapters (HBAs)

Celerity FC-321P
Data Rate:32Gb/s
Transfer Rate:3200MB/s
Ports:1
Bus Type:x8 PCIe 4.0
Included Optics1 SFP+
Celerity FC-322P
Data Rate:32Gb/s
Transfer Rate:6400MB/s
Ports:2
Bus Type:x8 PCIe 4.0
Included Optics2 SFP+
Celerity FC-324P
Data Rate:32Gb/s
Transfer Rate:12.8GB/s
Ports:4
Bus Type:x16 PCIe 3.0
Included Optics4 SFP+

Celerity™ FC - 32Gb/s Gen 6 Fibre Channel Host Bus Adapters (HBAs)

Celerity FC-321E
Data Rate:32Gb/s
Transfer Rate:3200MB/s
Ports:1
Bus Type:x8 PCIe 3.0
Included Optics1 SFP+
Celerity FC-322E
Data Rate:32Gb/s
Transfer Rate:6400MB/s
Ports:2
Bus Type:x8 PCIe 3.0
Included Optics2 SFP+
Celerity FC-324E
Data Rate:32Gb/s
Transfer Rate:12.8GB/s
Ports:4
Bus Type:x16 PCIe 3.0
Included Optics4 SFP+

Celerity™ FC - 16Gb/s Gen 6 Fibre Channel Host Bus Adapters (HBAs)

Celerity FC-161P
Data Rate:16Gb/s
Transfer Rate:1600MB/s
Ports:1
Bus Type:x8 PCIe 3.0
Included Optics1 SFP+
Celerity FC-162P
Data Rate:16Gb/s
Transfer Rate:3200MB/s
Ports:2
Bus Type:x8 PCIe 3.0
Included Optics2 SFP+
Celerity FC-164P
Data Rate:16Gb/s
Transfer Rate:6400MB/s
Ports:4
Bus Type:x8 PCIe 3.0
Included Optics4 SFF

Celerity™ FC - 8Gb/s Fibre Channel Host Bus Adapters (HBAs)

Celerity FC-81EN
Data Rate:8Gb/s
Transfer Rate:800MB/s
Ports:1
Bus Type:x8 PCIe 2.0
Included Optics1 SFP+
Celerity FC-82EN
Data Rate:8Gb/s
Transfer Rate:1600MB/s
Ports:2
Bus Type:x8 PCIe 2.0
Included Optics2 SFP+
Celerity FC-84EN
Data Rate:8Gb/s
Transfer Rate:3200MB/s
Ports:4
Bus Type:x8 PCIe 2.0
Included Optics4 SFP+

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