Ultrastar DC SS540 900GB SAS 12Gb/s 2.5-inch 15000RPM

The Western Digital Ultrastar DC SS540 900GB SAS 12Gb/s 2.5-inch 15000RPM (WUSTR6490ASS204) is a high-performance enterprise hard disk drive engineered for mission-critical storage environments demanding sustained throughput, low latency, and exceptional reliability. Built on a 2.5-inch small form factor with a 15,000 RPM spindle speed, this drive delivers the rapid rotational performance required by latency-sensitive transactional and analytical workloads. The SAS 12Gb/s dual-port interface provides high bandwidth connectivity with dual-path redundancy, a fundamental requirement for high-availability enterprise storage arrays, SANs, and server direct-attach configurations.

The Ultrastar DC SS540 is rated for a workload of up to 550TB per year, reflecting its design intent for continuous, heavy-duty enterprise operation. With an annualized failure rate (AFR) of 0.44% and a mean time between failures (MTBF) of 2,000,000 hours, the drive is positioned for deployment in environments where data integrity and uptime are non-negotiable. The drive incorporates Western Digital's advanced error correction and media cache management technologies, along with vibration compensation features that sustain performance in high-density multi-drive enclosures subject to rotational vibration.

As an Ultrastar-series product, the DC SS540 targets enterprise datacenters, AI inference storage tiers, high-frequency transactional databases, and cloud infrastructure requiring a balance of capacity density at the 2.5-inch form factor and raw IOPS performance. Its compatibility with enterprise SAS storage controllers and RAID subsystems from major server and storage vendors makes it a versatile, rack-deployable asset for organizations in demanding operational sectors including financial services, telecommunications, healthcare, and large-scale cloud operations.

Ideal for

• High-frequency OLTP database storage requiring sub-millisecond access latency and sustained random IOPS across mixed read/write workloads
• Enterprise SAN and NAS arrays where SAS dual-port redundancy and high MTBF are prerequisites for continuous availability SLAs
• AI and machine learning inference tiers demanding rapid sequential and random data retrieval from large structured datasets
• Virtualization infrastructure hosting dense VM environments on hyper-converged or blade server platforms with high per-spindle I/O demand
• Mission-critical ERP and CRM application backends where storage reliability and consistent low-latency response underpin business operations
• High-density datacenter refresh projects replacing aging 15K SAS drives with a current-generation model maintaining form-factor and interface compatibility

Technical specifications

Available from Omnixon Global. Submit an RFQ and our team will confirm configuration and availability for your order.