Western Digital Ultrastar DC HA340 3.5-inch 4TB SATA Internal Hard Drive 0B47076

Western Digital Ultrastar DC HA340 3.5-inch 4TB SATA Internal Hard Drive 0B47076 The Western Digital Ultrastar DC HA340 0B47076 is a 4TB enterprise-class 3.5-inch hard drive designed for data centres, servers and demanding storage systems. Combining a 7200 RPM spindle speed, SATA 6 Gb/s interface, 256MB cache and Conventional Magnetic Recording, it delivers up to 267 MB/s sustained transfer performance while supporting workloads of up to 550TB per year and continuous 24/7 operation. Key Features 4TB enterprise storage: Provides 4TB of capacity for servers, storage arrays and other data-intensive business applications. 7200 RPM performance: Combines a 7200 RPM spindle speed with a 256MB data buffer for responsive enterprise storage workloads. Up to 267 MB/s transfer rate: Delivers high sustained sequential performance through a SATA 6 Gb/s interface. CMR recording technology: Uses Conventional Magnetic Recording for predictable performance across demanding storage workloads. 550TB/year workload rating: Performance-optimised for heavy data-centre application workloads significantly beyond typical desktop HDD usage. 2 million-hour MTBF: Designed for demanding enterprise environments with a projected 2.0 million-hour mean time between failures. 24/7 operation: Engineered for continuous round-the-clock deployment in compatible data-centre and enterprise storage systems. Designed for Data Centre Workloads The Ultrastar DC HA340 is designed for data-intensive applications that require dependable capacity and sustained performance. Western Digital rates the drive for workloads of up to 550TB per year, making it suitable for compatible servers, storage systems, cloud infrastructure and traditional enterprise IT environments. Enterprise Performance The 0B47076 combines a 7200 RPM spindle speed with a 256MB data buffer and SATA 6 Gb/s interface. The 4TB model provides a maximum sustained transfer rate of up to 267 MB/s, along with specified random performance of 154 read IOPS and 425 write IOPS under Western Digital's test conditions. Reliability for Continuous Operation Designed for 24/7 availability, the Ultrastar DC HA340 has a projected MTBF rating of 2 million hours and a projected annualised failure rate of 0.44%. Rotational Vibration Safeguard technology uses dual sensors to anticipate and compensate for vibration, helping maintain performance when the drive operates in vibration-prone multi-drive environments. Technical Specifications Specification Details Brand Western Digital Product Family Ultrastar Series DC HA340 Manufacturer Part Number 0B47076 Model Number WUS721204BLE6L4 Product Type Data centre internal hard disk drive Storage Capacity 4TB Form Factor 3.5 inch Interface SATA 6 Gb/s Sector Format 512e Recording Technology Conventional Magnetic Recording (CMR) Spindle Speed 7200 RPM Data Buffer 256MB Average Latency 4.16 ms Maximum Interface Transfer Rate 6 Gb/s Maximum Sustained Transfer Rate 267 MB/s (255 MiB/s) Random Read Performance 154 IOPS (4K, QD16) Random Write Performance 425 IOPS (4K, QD16) Workload Rate Limit Up to 550TB per year Availability 24 hours/day, 7 days/week MTBF 2,000,000 hours, projected Annualised Failure Rate 0.44%, projected Load / Unload Cycles 600,000 at 40°C Non-Recoverable Error Rate 1 in 10 15 bits read Rotational Vibration Protection Rotational Vibration Safeguard (RVS) with dual sensors Power Requirement +5 VDC / +12 VDC Typical Operating Power 7.0 W Idle Power 5.8 W Operating Temperature 5°C to 60°C Non-Operating Temperature -40°C to 70°C Operating Shock 70 G, 2 ms Non-Operating Shock 300 G, 2 ms Operating Vibration 0.67 G RMS, 5 to 500 Hz Non-Operating Vibration 1.04 G RMS, 2 to 200 Hz Dimensions (L × W × H) 146.99 × 101.6 × 26.11 mm Weight Approx. 0.72 kg Compatible Operating Systems Windows, Windows Server and Linux Manufacturer Warranty 5-year limited warranty What’s in the Box: 1 × Western Digital Ultrastar DC HA340 4TB Data Centre HDD Equip a compatible server or storage system with 4TB of enterprise-class CMR storage engineered for 24/7 workloads, and add the Western Digital Ultrastar DC HA340 0B47076 to your cart today.