400-AZWK Dell 12TB 7.2K RPM SAS-12GBPS 256MB 512E 3.5Inch LFF Hard Drive

Dell 12TB 7.2K RPM SAS-12GBPS LFF HDD

The Dell 400-AZWK 12TB Hard Disk Drive is a high-capacity, enterprise-grade storage solution designed for demanding data center environments and storage arrays. Built for reliability and performance, this 3.5-inch Large Form Factor (LFF) SAS hard drive delivers consistent throughput and advanced data protection features for mission-critical workloads.

General Information

• Manufacturer: Dell
• Part Number: 400-AZWK
• Drive Type: Hard Disk Drive

Technical Specifications

• Capacity: 12TB
• Form Factor: 3.5 Inch LFF
• Sector Size: 512e Advanced Format

Interface & Security

• Interface Type: SAS 12Gbps
• Encryption: Yes (Self-Encrypting Drive with FIPS 140 compliance)

Speed & Responsiveness

• Rotational Speed: 7200 RPM
• Average Latency: 4.16 ms
• Buffer Memory: 256MB cache

Data Transfer Performance

• Sustained Read Speed: 243 Mbps
• Sustained Write Speed: 255 Mbps

Seek Time

• Typical Read Seek Time: 8.0 ms
• Typical Write Seek Time: 8.6 ms

Interface Support

• 1 x SAS 12Gb/s high-speed interface

Drive Bay Compatibility

• 1 x Hot-swap 3.5-inch LFF drive bay

System Compatibility

Supported Dell Storage Systems

• Dell PowerVault ME4084
• Dell PowerVault ME484

Dell 400-AZWK 12TB 7.2K RPM Hard Disk Drive Overview

The Dell 400-AZWK 12TB 7.2K RPM SAS-12Gbps 256MB 512e 3.5 Inch LFF Hard Disk Drive is a high-capacity enterprise-class storage solution engineered for demanding storage array environments. Designed to deliver consistent reliability, sustained throughput, and compatibility with enterprise storage infrastructures, this hard disk drive is widely deployed in data centers, virtualization clusters, and large-scale backup systems where stability and capacity are critical. As modern organizations continue to generate exponential data growth, storage technologies such as this SAS-based hard drive play a foundational role in ensuring scalable, durable, and efficient data retention.

Enterprise SAS Storage Technology Foundation

Serial Attached SCSI (SAS) technology forms the backbone of the Dell 400-AZWK drive, offering a robust communication protocol optimized for enterprise workloads. Unlike consumer-grade interfaces, SAS is engineered for multi-device environments, enabling reliable full-duplex communication and superior command queuing capabilities. This architecture allows simultaneous read and write operations, significantly enhancing performance consistency in multi-user and multi-application environments commonly found in enterprise storage arrays.

SAS-12Gbps Interface Architecture and Data Throughput

The 12Gbps SAS interface is one of the defining characteristics of this hard disk drive, enabling high-speed data transfer rates that support modern enterprise workloads. This bandwidth capacity ensures that the drive can efficiently handle large volumes of sequential and random data requests. In storage arrays, multiple drives working in parallel benefit from this high-speed interface, reducing bottlenecks and improving overall system responsiveness.

SAS-12Gbps architecture is designed with backward compatibility in mind, ensuring integration with existing SAS infrastructures while still offering enhanced throughput capabilities. This makes the Dell 400-AZWK an ideal upgrade component for organizations transitioning from older storage systems to higher-performance architectures.

Full-Duplex Communication Efficiency

A key advantage of SAS technology lies in its full-duplex communication capability, which allows simultaneous data transmission and reception. This ensures that read and write operations do not compete for bandwidth in the same way as traditional SATA interfaces. The result is smoother workload distribution, reduced latency, and improved consistency under heavy I/O operations.

7.2K RPM Rotational Speed Performance Characteristics

The 7,200 RPM spindle speed of the Dell 400-AZWK drive provides a balanced combination of performance and power efficiency. While higher RPM drives such as 10K or 15K models offer faster access times, the 7.2K configuration is optimized for capacity-heavy workloads where sustained throughput is more important than ultra-low latency. This makes the drive especially suitable for archival storage, backup repositories, and large-scale data lakes.

The rotational speed also contributes to predictable performance curves, allowing storage administrators to design systems with consistent input/output expectations. This predictability is essential in enterprise environments where workload stability is as important as raw speed.

12TB Storage Capacity and Data Density Engineering

With a massive 12TB storage capacity, the Dell 400-AZWK is engineered to handle extensive datasets while minimizing physical rack space requirements. High-density storage is a critical requirement in modern data centers where space optimization directly impacts operational costs and scalability.

The internal platters of the drive utilize advanced magnetic recording technologies that maximize areal density. This allows more data to be stored on each platter surface without compromising reliability or read/write accuracy. As a result, organizations can deploy fewer physical drives while achieving higher total storage capacities.

3.5 Inch LFF Form Factor Advantages

The 3.5 inch Large Form Factor (LFF) design of the Dell 400-AZWK drive is specifically tailored for high-capacity storage applications. LFF drives are widely used in enterprise storage arrays due to their ability to accommodate larger platters, which directly correlates with higher storage density.

The physical design also supports hot-swap capabilities in compatible storage enclosures, enabling maintenance and upgrades without system downtime. This is essential in mission-critical environments where continuous availability is required.

Mechanical Stability in High-Density Enclosures

The LFF architecture enhances mechanical stability by allowing more robust internal spacing and vibration dampening. This is particularly important in multi-drive storage arrays where vibration interference can impact performance and long-term reliability.

256MB Cache and Firmware-Level Optimization

The integrated 256MB cache plays a crucial role in improving the performance efficiency of the Dell 400-AZWK hard drive. This high-capacity buffer allows frequently accessed data to be temporarily stored for faster retrieval, reducing access latency and improving throughput in repetitive workloads.

Firmware-level optimization further enhances cache utilization by dynamically managing read and write prioritization based on workload patterns. This intelligent data handling ensures that critical operations are processed efficiently even under heavy system loads.

512e Advanced Format Technology

The 512e (512-byte emulation) format used in this drive bridges the gap between legacy systems and modern storage architectures. While internally utilizing advanced sector formats, the drive maintains compatibility with systems expecting traditional 512-byte sector sizes.

This compatibility ensures seamless integration into existing enterprise infrastructures without requiring immediate system overhauls or compatibility upgrades.

Data Integrity and Sector Translation Efficiency

Sector translation processes are handled at the firmware level, ensuring that data integrity is maintained while optimizing storage efficiency. This allows enterprises to adopt higher-capacity drives without compromising legacy application compatibility.

Compatibility with Dell Storage Arrays and Server Infrastructure

The Dell 400-AZWK drive is specifically designed for integration with Dell storage systems and PowerEdge servers, ensuring full compatibility and optimized performance. This includes seamless integration into RAID configurations where multiple drives work together to provide redundancy and performance scaling.

In enterprise environments, RAID configurations are essential for ensuring data protection and performance optimization. The drive supports various RAID levels, enabling administrators to design storage architectures tailored to specific workload requirements.

Enterprise RAID Integration Efficiency

When deployed in RAID arrays, the drive contributes to improved data redundancy and fault tolerance. The combination of SAS interface reliability and consistent rotational performance ensures stable operation across complex storage configurations.

Scalability in Modern Storage Architectures

Scalability is a critical requirement in modern IT infrastructure, and this hard drive supports horizontal scaling in storage arrays. As data requirements grow, additional drives can be integrated into existing systems without disrupting operational continuity.

This scalability ensures that organizations can expand their storage capacity incrementally while maintaining performance consistency.