Three Stages of Storage Architecture Evolution
Stage one (traditional): SAS/SATA HDDs as the mainstay, with SSDs serving as a cache tier. Storage is centrally managed over a SAN (storage area network), and performance is bounded by HDD mechanical latency, typically 5-10ms.
Stage two (hybrid): mixed SSD and HDD deployments, with hot data on the SSD tier and cold data on HDDs, migrated automatically by tiering software. SATA and SAS SSDs were the workhorses of this stage.
Stage three (all-flash): NVMe SSDs throughout, with NVMe-oF (NVMe over Fabrics) pooling and sharing storage resources. Access latency drops to the microsecond range (under 100μs) and IOPS improves by more than 100x. This is the ideal architecture for AI and real-time analytics workloads.
Maturity of the NVMe Ecosystem
Since its release in 2011, the NVMe protocol has built a highly mature ecosystem: from SSD controllers (Marvell, Phison, Samsung's in-house designs) to host-side drivers (native support in the Linux kernel), and from management tooling (nvme-cli) to monitoring (NVMe-MI), the full stack has been proven at production scale.
NVMe-oF (NVMe over Fabrics) supports three transports — RDMA, TCP, and FC — letting NVMe SSDs be accessed remotely like network resources and enabling storage disaggregation and pooling. In 2026, NVMe/TCP is becoming the mainstream choice for data center NVMe-oF deployments thanks to its compatibility with existing Ethernet infrastructure.
Key Considerations During Migration
Moving from HDD to all-flash NVMe is not a simple hardware swap. It requires weighing several factors: adapting the storage software stack (legacy SAN software may not fully exploit NVMe performance); revisiting the thermal design (NVMe SSDs have higher power density than HDDs); choosing a data migration strategy (online versus offline migration); and TCO analysis — per-unit-capacity, NVMe SSDs still cost more than HDDs, but once performance density, energy efficiency, and operating costs are factored in, total cost of ownership can come out ahead.
JH Semiconductor's Data Center Storage Roadmap
JH Semiconductor is building an enterprise NVMe SSD product line spanning the mainstream U.2/U.3, E3.S, E1.S, and AIC form factors, covering both PCIe 4.0 and PCIe 5.0 platforms, with per-drive capacities planned up to 122.88TB. Our engineering team can support customers with storage architecture assessment, product selection, and migration planning toward a smooth transition to all-flash; in parallel, our server and storage supply chain services provide diversified component sourcing for hybrid architectures during the transition period.