WD HGST ULTRASTAR 4TB SATA 3.5 HUS726T4TALA6L4-0B35950

• WD HGST Ultrastar DC HC310 – 4TB (0B35950)

The WD HGST Ultrastar 4TB SATA 3.5″ HUS726T4TALA6L4-0B35950 is an enterprise-class hard disk drive designed for robust, 24/7 operation in data centers, servers, and high-capacity storage systems. This drive, part of the Ultrastar DC HC310 series, represents Western Digital’s legacy from their acquisition of HGST (Hitachi Global Storage Technologies), known for its highly reliable enterprise storage solutions.

Key Features & Specifications

• Capacity: 4TB, offering a substantial amount of storage for enterprise applications.
• Form Factor: 3.5-inch, the standard size for server and storage array bays.
• Interface: SATA III (6 Gb/s), providing a fast and widely compatible connection for data transfer.
• Rotational Speed (RPM): 7200 RPM, delivering strong performance typical for enterprise mechanical drives, crucial for quick data access in multi-user environments.
• Cache Size: 128MB or 256MB. (Note: Some listings show 128MB, while others show 256MB for this specific model number. Always verify the exact part number’s specs from the manufacturer’s official datasheet if precise cache size is critical).
• Max. Sustained Transfer Rate: Up to 233 MB/s (for 512n models) or up to 255 MB/s (for 512e/4Kn models). This particular model (HUS726T4TALA6L4) is typically a 512n drive.
• Workload Rating: Up to 550TB per year. This is a key differentiator, signifying its ability to handle extremely high volumes of data read/write cycles annually, far exceeding consumer-grade drives.

Specifications

Reliability:

• • MTBF (Mean Time Between Failures): Up to 2.0 million hours (some sources indicate 2.5 million hours for Ultrastar, but 2.0M is standard for this generation), highlighting its exceptional durability for continuous, mission-critical operations.
  • Load/Unload Cycles: 600,000 cycles.
  • Non-recoverable Read Errors: Less than 1 per 1015 bits read, ensuring very high data integrity.
• Vibration Protection: Features advanced technologies like Rotational Vibration Safeguard (RVS) to actively detect and compensate for vibrations, maintaining performance and reliability in multi-drive server environments.
• Time-Limited Error Recovery (TLER): Crucial for RAID configurations, this feature helps prevent drives from being dropped from arrays due to extended error recovery processes.
• Recording Technology: Employs Conventional Magnetic Recording (CMR), which is preferred for its consistent performance and reliability, especially in RAID arrays.
• Sector Format: Available in 512 native (512n) for legacy system compatibility and also in Advanced Format (512e or 4Kn) depending on the exact sub-model. The HUS726T4TALA6L4 is typically a 512n format drive.
• Non-Volatile Cache (NVC): Enhances write performance and provides protection against write splice errors.
• Compatibility: Extensively tested across various OEM storage systems, SATA controllers, and host bus adapters for seamless integration.
• Warranty: Typically backed by a 5-year limited warranty, reflecting its enterprise-grade design and intended long-term use.

Ideal Use Cases

• Enterprise Servers: For applications requiring high uptime, consistent performance, and robust data integrity.
• Datacenter Environments: Including hyperscale deployments, private cloud storage, and data warehousing.
• Enterprise Storage Systems: Such as large RAID arrays, SANs, and high-bay Network Attached Storage (NAS) solutions.
• Data Analytics & Big Data: Where continuous access and processing of large datasets are required.
• High-end Surveillance Systems: That demand reliable and performant storage for continuous video recording.

Full Specifications

Key Details

• Brand: HGST (a Western Digital brand)
• Series: Ultrastar DC HC310
• Model Number: 0B35950
• Storage Capacity: 4 Terabytes (TB)
• Form Factor: 3.5-Inch (Standard drive size for enterprise servers and storage arrays)
• Interface: SAS (Serial Attached SCSI – a high-performance, enterprise-grade interface)
• Disk Speed (RPM): 7200 RPM (Revolutions Per Minute, indicating high rotational speed for performance)
• Recording Technology: CMR (Conventional Magnetic Recording – preferred for consistent, predictable performance in enterprise arrays)
• Cache Size: 256 Megabytes (MB)
• Security: Self-Encrypting Drive (SED) Available (Offers hardware-based data encryption for enhanced security)

Performance & Durability

• Transfer Rate: Up to 255 MB/s (Megabytes per second)
• MTBF (Mean Time Between Failures): High Durability for Enterprise Workloads (Engineered for excellent reliability and a long expected lifespan in 24/7 operations)

Physical & Environmental

• Dimensions (L × W × H): 147mm × 101.6mm × 26.1mm (5.79″ × 4″ × 1.03″)
• Weight: 715g
• Operating Temperature: 5°C to 60°C (41°F to 140°F)
• Non-Operating Temperature: -40°C to 70°C (-40°F to 158°F)

Certifications & Warranty

• Certifications: BSMI, ICES-003/NMB-003, CE, FCC, KC, Maghreb, RCM, UKCA, VCCI, CB-Scheme, TUV, UL (Ensures compliance with various international quality, safety, and environmental standards)
• Warranty: 5-Year Limited Warranty