What is the difference between the Ultrastar SN200 and SN640?

The SN200 is an earlier-generation enterprise NVMe SSD with lower endurance ratings. The SN640 is the newer replacement with improved endurance, performance, and firmware features. Both use PCIe Gen3 x4 NVMe and U.2 form factor.

Can the SN200 be used in a SATA drive bay?

No. The SN200 uses the NVMe protocol over PCIe Gen3 x4 with a U.2 (SFF-8639) connector. It is not compatible with SATA or SAS backplanes.

Is 960GB sufficient for server boot storage?

Yes. 960GB is a common enterprise capacity for server OS drives and boot storage. For larger VM datastores or database storage, the 1.92TB or 3.84TB variants may be more appropriate.

Western Digital Ultrastar SN200 NVMe SSD (54-91-60013-1024G): This is a U.2 2.5-inch enterprise NVMe solid-state drive with 960GB capacity operating over a PCIe Gen3 x4 interface. It is a data center SSD from Western Digital's previous-generation Ultrastar NVMe lineup, designed for read-intensive workloads. This is not a consumer SSD and not a SATA drive.

Engineering Context

The Ultrastar SN200 is an earlier-generation enterprise NVMe SSD from Western Digital (originally HGST). The PCIe Gen3 x4 NVMe interface provides enterprise-grade throughput and latency characteristics suited for server environments. The U.2 form factor enables hot-swap deployment in standard enterprise server drive bays. At 960GB, this capacity is common for server boot drives, OS storage, read caches, and light mixed workloads. The SN200 predates the SN640 series and has lower endurance ratings, making it more suited for read-heavy rather than write-intensive applications.

Deployment & Use Cases

Server Boot / OS Storage: Reliable NVMe boot drive for enterprise servers.
Read Cache: Database read caches and content delivery acceleration where read IOPS are the primary metric.
Lab / Development: Cost-effective enterprise NVMe storage for development, testing, and non-production environments.
Legacy NVMe Refresh: Replacement drive for servers originally deployed with the SN200 series.

Technical Specifications

OEM: Western Digital (HGST)
Model: Ultrastar SN200
Part Number: 54-91-60013-1024G
Capacity: 960GB
Interface: PCIe Gen3 x4 NVMe
Form Factor: U.2 2.5-inch (SFF-8639)
Endurance Class: Read-Intensive
Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS

Compatibility & Hard Constraints

NVMe Only: Requires a U.2 NVMe-capable drive bay or PCIe adapter. Does not work in SATA-only or SAS-only drive bays.
Previous Generation: The SN200 is an older Ultrastar NVMe series. For higher endurance or newer firmware features, the SN640 or SN650 series are the current replacements.
U.2 Connector: Uses SFF-8639 U.2 connector. Not M.2 form factor.
Refurbished: Drive health and remaining endurance (TBW) should be verified using NVMe SMART data after installation.

Western Digital Ultrastar SN200 960GB NVMe SSD

Name: Western Digital Ultrastar SN200 960GB NVMe SSD
SKU: 54-91-60013-1024G_Refurbished

SKU: 54-91-60013-1024G_Refurbished

€210.00

Quantity