0B47749 Western Digital Ultrastar Dc Hc555 20 TB 7.2K RPM SAS 12GBPS HDD.

Western Digital Ultrastar DC HC555 Enterprise HDD Overview

Engineered for the most demanding data environments, this enterprise-class hard drive delivers exceptional storage density and unwavering reliability. It is a cornerstone component for building robust and scalable data infrastructure.

Primary Attributes and Specifications

The Ultrastar DC HC555 represents a pinnacle of storage technology, integrating advanced features for superior performance.

Core Product Identification

• Manufacturer Brand: Western Digital
• Model Designation: 0B47749
• Device Classification: Internal Hard Disk Drive
• Product Family: Ultrastar
• Series Name: Ultrastar DC HC555
• Interface Protocol: SAS 12 Gb/s

Massive Data Storage Capacity

With a formidable 20 TB of space, this drive accommodates vast datasets, reducing the physical footprint required per terabyte and simplifying storage expansion.

Intended Deployment Scenarios

This component is purpose-built for high-caliber enterprise and data center operations where performance and capacity are critical.

Optimal Use Cases

• Hyperscale computing and big data analytics platforms
• Machine learning and artificial intelligence data pools
• Integrated converged and hyperconverged infrastructure systems
• Public, private, and hybrid cloud storage deployments

Performance and Operational Metrics

The drive's architecture is optimized for high-throughput and low-latency operations, ensuring smooth data flow.

Speed and Data Transfer Capabilities

• Rotational Velocity: 7200 RPM
• Maximum External Transfer Rate: 1200 MB/s (12 Gb/s SAS)
• Sustained Internal Data Rate: 285 MB/s
• Average Latency: 4.16 ms
• Cache Memory Size: 512 MB

Engineering and Build Characteristics

Designed with precision, this HDD utilizes a helium platform for enhanced efficiency and reliability.

Physical Dimensions and Construction

• Form Factor: 3.5-inch
• Product Z-Height: 26.1 mm
• Width x Depth Dimensions: 101.6 mm x 147 mm
• Unit Mass: 690 grams
• Mean Time Between Failures (MTBF): 2.5 million hours

Advanced Technology and Reliability

Featuring energy-assisted magnetic recording technology and a helium-sealed design, this drive achieves higher areal density with improved power efficiency and superior operational reliability for mission-critical applications.

Western Digital Ultrastar DC HC555 Enterprise Hard Drives

The Western Digital Ultrastar DC HC555 20TB series is engineered for demanding enterprise storage environments. Combining high capacity, exceptional reliability, and advanced performance features, these 3.5-inch helium-filled hard disk drives (HDDs) are designed to meet the requirements of modern data centers, cloud storage, and high-performance computing systems.

High-Capacity Storage Solution

With an impressive 20 TB storage capacity, the Ultrastar DC HC555 allows organizations to store massive volumes of data on a single drive. This high-capacity solution minimizes the physical footprint in storage arrays while reducing power consumption, cooling requirements, and operational costs.

• Supports large-scale databases, big data analytics, and archival storage needs.
• Optimized for capacity-dense storage environments in enterprise data centers.
• Helium-filled technology reduces friction and improves mechanical efficiency.

Performance Specifications

The Ultrastar DC HC555 delivers outstanding performance suitable for enterprise workloads. Operating at 7,200 RPM, the drive balances speed with reliability, ensuring data access and transfer are efficient for both sequential and random workloads.

SAS 12Gbps Interface

Equipped with a Serial Attached SCSI (SAS) 12Gbps interface, this drive provides high-speed connectivity and ensures low-latency data access. The SAS interface supports multi-drive environments and is ideal for RAID configurations in enterprise servers and storage arrays.

512MB Cache Buffer

The 512MB cache buffer enhances read/write efficiency, enabling faster data retrieval and smoother performance in intensive workloads. This large cache improves sequential read/write operations and enhances performance in mixed workload environments.

Advanced Helium Technology

Western Digital’s HelioSeal technology fills the Ultrastar DC HC555 with helium, significantly reducing internal friction and turbulence. This innovation leads to several advantages for enterprise storage:

• Lower power consumption compared to conventional air-filled drives.
• Reduced heat generation, contributing to longer drive lifespan.
• Higher reliability and increased durability in demanding workloads.
• Enables higher areal density, supporting the 20TB capacity in a standard 3.5-inch form factor.

Enhanced Reliability and Data Integrity

Enterprise environments demand high reliability, and the Ultrastar DC HC555 is built with robust components and advanced features to ensure data integrity.

Predictive Failure Analysis

The drive incorporates predictive failure analysis to monitor health status and anticipate potential issues before they occur, reducing downtime and maintenance costs.

Dual-Stage Actuator

With a dual-stage actuator, the drive achieves precise head positioning, reducing errors and improving read/write accuracy. This technology enhances reliability, especially in high-capacity storage systems.

End-to-End Data Protection

Advanced error correction and end-to-end data protection mechanisms safeguard stored information. The drive supports 512e sector size, ensuring compatibility with modern storage applications while maintaining data integrity.

Enterprise Applications

The Ultrastar DC HC555 20TB is ideal for a wide range of enterprise storage applications, offering flexibility and performance in various use cases.

Data Center Storage

• Optimized for hyperscale and enterprise data centers.
• Supports large-scale storage arrays and modular storage systems.
• Reduces total cost of ownership with higher capacity per drive.

Cloud and Hyperscale Storage

• Helium-filled drives reduce energy costs in massive cloud deployments.
• Supports workloads requiring consistent high performance and reliability.
• Compatible with leading cloud storage infrastructure and solutions.

Big Data and Analytics

• Handles high-volume sequential write operations effectively.
• Suitable for Hadoop, data lakes, and AI/ML workloads.
• Maintains data integrity and performance for large datasets.

Energy Efficiency

Energy efficiency is a critical factor in enterprise storage solutions. The HelioSeal design of the Ultrastar DC HC555 reduces drag on the spinning platters, decreasing energy consumption during operation. This contributes to lower cooling requirements, making it ideal for data centers looking to reduce operational costs while maintaining high storage density.

Power Management Features

• Advanced power management settings to reduce energy usage.
• Intelligent idle modes for lower energy consumption during inactivity.
• Helium-sealed design further enhances operational efficiency.

Durability and Operational Lifespan

The Ultrastar DC HC555 is designed for continuous 24/7 operation in enterprise environments. With its robust construction and helium-filled architecture, it offers a longer lifespan and high endurance for demanding workloads.

MTBF and Warranty

The drive features a high mean time between failures (MTBF) rating, ensuring reliable performance over its operational life. Western Digital backs the Ultrastar DC HC555 with a strong enterprise warranty, providing peace of mind for mission-critical deployments.

Shock and Vibration Resistance

Engineered to withstand shock and vibration common in large storage arrays, the Ultrastar DC HC555 maintains stable performance even in high-density environments. This reduces the risk of downtime and data loss due to mechanical stress.

Compatibility and Integration

The Ultrastar DC HC555 is compatible with a wide array of storage systems, servers, and RAID configurations, making it versatile for enterprise storage deployment.

RAID Configurations

• Compatible with RAID 0, 1, 5, 6, 10, and other advanced configurations.
• Supports large-scale enterprise storage arrays and modular JBOD setups.
• Optimized for high-availability storage clusters.

Server and Storage Platform Support

Designed for use with modern enterprise servers, storage arrays, and SAN/NAS systems, the Ultrastar DC HC555 integrates seamlessly with industry-standard platforms, ensuring smooth deployment and management.