FADU Announces FS-SSD to Move Filesystem Operations Into SSD Controllers
FADU’s new drive embeds NFSv3 in NVMe commands, allowing GPUs and NICs to read files without host CPU involvement.
Key points
- FADU announced its File-Semantic SSD at the 2026 OCP Global Summit, with partner samples expected in Q3 2027.
- The technology embeds NFSv3 operations inside standard NVMe commands to bypass host filesystems and block layers.
- Preliminary tests showed the drive maintained 460,000 ops/s even when host cores were reduced from 16 to one.
SSD controller designer FADU announced its new File-Semantic SSD (FS-SSD) at the 2026 OCP Global Summit, introducing a device that moves file system operations directly into the storage controller. According to a report by Tom’s Hardware, this architecture allows peripherals such as GPUs, DPUs, and NICs to access files without requiring a host file system or storage-server CPU in the data path.
FADU expects to deliver partner samples by the third quarter of 2027. The company, which is based in Seoul, South Korea, described the FS-SSD as a solution designed to handle control path inefficiencies that have persisted as data paths moved to accelerators. The technology remains under active development, with FADU targeting Gen6-host results for the first quarter of 2027 before finalizing samples.
Technical Architecture and Performance
The FS-SSD carries Network File System version 3 (NFSv3) operations inside standard NVMe commands. This approach enables the drive to handle path lookup, access control, and file-to-flash mapping internally. FADU selected NFSv3 because it is stateless, has low firmware overhead, and consists of only 21 operations, making it agnostic to the host operating system and filesystem.
In preliminary testing, FADU used a drive built on its FC6161 Gen6 controller in a PCIe 5.0 host. The tests demonstrated that remote file throughput held steady at approximately 460,000 operations per second even when the server was downshifted from 16 cores to a single core. FADU noted that traditional Linux NFS-over-RDMA achieved only a third of that throughput with 16 cores and significantly less with one core.
Impact on Host Resources
FADU’s internal measurements indicate that file systems and block layers can consume about 30% of CPU cycles in GPUDirect Storage random-read workloads. By moving these operations to the SSD, the FS-SSD aims to eliminate that overhead. The company claims its solution offers the benefits of bypassing the host while retaining file-level semantics, which other bypass options often sacrifice.
The drive supports PCIe today, with NVMe-oF over RDMA and TCP working without requiring new transport protocols. Under the hood, the file system and flash translation layer are merged with a file layer derived from F2FS. Node and data blocks are aligned with natural flash pages and erase units, converting the F2FS node table into a "File Map" that points node IDs to physical flash addresses.
What should you do?
Security and infrastructure professionals should monitor FADU’s progress as the technology moves from active development to partner sampling. Organizations planning GPU or DPU architectures should evaluate how moving filesystem logic to storage controllers affects their existing access control models and audit trails. That suggests a shift in where security policies must be enforced within the storage stack.
What to do and how to stay safe: FADU
- Review current storage architectures to identify workloads where host CPU overhead for filesystem operations is a bottleneck.
- Assess the security implications of offloading access control and path lookup to firmware rather than the host operating system.
- Monitor FADU’s public updates for Gen6-host results in Q1 2027 and partner samples in Q3 2027.
- Evaluate whether existing NVMe-oF over RDMA or TCP deployments can integrate with file-semantic SSDs without new transport requirements.
Step-by-step guide: Mobile Device Security: How to Protect Data Beyond Passwords
General security guidance from the Threat Times newsroom. It is not confirmed advice from the organisations named in this story.
Frequently asked questions
When will FADU’s File-Semantic SSD be available for partners?
FADU expects to provide partner samples in the third quarter of 2027, following Gen6-host results in the first quarter of 2027.
Why does FADU use NFSv3 for its FS-SSD technology?
FADU chose NFSv3 because it is small, stateless, OS- and filesystem-agnostic, and requires low firmware overhead.
How does the FS-SSD reduce host CPU usage?
The drive handles file system and block layer operations internally, which FADU says can consume about 30% of CPU cycles in certain workloads.
