0B35919 WD Ultrastar DC HC310 4TB SAS 256 MB 3.5" Server HDD

Enterprise 3.5" SAS Datacenter HDD for Reliable Capacity Tiering with the 0B35919

The 0B35919 is a WD Ultrastar DC HC310 4TB 7,200 RPM SAS hard drive engineered for server and storage platforms that require predictable latency and consistent throughput under mixed I/O. In SAS backplanes it integrates cleanly with modern RAID controllers and SAS expanders, enabling deterministic device management and robust error recovery behavior required in shared storage domains.

Built on CMR recording, the 0B35919 supports steady write performance for backup windows, warm datasets, and general-purpose virtualisation storage without the write amplification penalties associated with SMR. A 256MB cache helps absorb short bursts and optimize sequential transfers, while 512n sector formatting aligns with many enterprise OS and hypervisor stacks. For scalable architectures, the 0B35919 is well suited to tiered designs where NVMe handles hot data and SAS HDDs deliver cost-efficient bulk capacity in JBOD shelves or entry storage arrays.

Why Choose the 0B35919?

The 0B35919 provides an efficient density-to-performance profile for SAS-based 3.5" hot-swap environments, balancing capacity with a 7.2K spindle for steady service times. With 24x7 duty design and a 2.0M-hour MTBF target, the 0B35919 supports reliable fleet operations, consistent rebuild behavior, and predictable scaling as additional drives are added to RAID sets or expanded JBOD domains.

WD designs Ultrastar datacenter drives with a focus on sustained workload capability, controlled vibration characteristics, and compatibility with enterprise SAS ecosystems. The platform is aligned to modern data center operational standards, emphasizing reliability engineering, serviceability, and secure lifecycle management features such as Secure Erase.

Key Applications:

• Backup and archival repositories
• Bulk capacity tiering (cold/warm data)
• SAS JBOD shelves and storage arrays
• General-purpose virtualisation datastores

At Happyware - Server Hardware you benefit from Non-Binding Offers tailored to your SAS storage and capacity planning requirements, and you can extend protection with an Extended Warranty up to 6 years to secure long-term datacenter operations for deployments based on the 0B35919.