400-ATKL Dell 4TB 7.2K RPM SAS-12GBPS 512N LFF Hard Drive

Overview of Dell 400-ATKL 4TB SAS 12Gb/s 3.5"  Hard Drive 

The Dell 400-ATKL is a high-capacity 4TB nearline enterprise hard drive designed for scalable server environments. Built with SAS 12Gb/s connectivity and 7200 RPM performance, it delivers reliable storage, consistent throughput, and efficient data handling for modern data center operations.

Product Information

• Brand: Dell
• Dell Part Number: 400-ATKL
• Product Type: Hot-plug enterprise hard drive with tray

Technical Specifications

• Storage Capacity: 4TB
• Form Factor: 3.5-inch large form factor (LFF)
• Interface Type: SAS 12Gb/s high-speed connection
• Sector Format: Advanced Format 512n
• Cache Buffer: 256MB high-performance memory
• Drive Category: Nearline enterprise storage HDD

Performance Characteristics

• Spindle Speed: 7200 RPM for balanced performance
• Average Latency: 4.16 ms for responsive access
• External Data Transfer Rate: Up to 1.2 Gbps

Benefits

• 7200 RPM spindle speed ensures stable and consistent data access
• SAS 12Gb/s interface provides strong bandwidth and reliability
• Ideal for nearline storage, backup, and archival workloads

Reliability

• Hot-plug functionality enables maintenance without downtime
• Engineered for continuous enterprise-grade operation
• Built for scalable and high-density server environments

Physical Design

• 3.5-inch LFF enterprise form factor
• Pre-installed tray for simplified installation
• Designed for rack-mounted server infrastructure

Compatible HPE ProLiant Server Series

• BL Series:BL420c, BL460c, BL465c, BL660c (Gen8/Gen9)
• DL Series:DL20, DL60, DL80, DL120, DL160, DL180, DL320e, DL360, DL380, DL560, DL580 
• ML Series:ML110, ML150, ML310e, ML350 variants 
• SL Series:SL230s, SL250s, SL270s

Details of Dell 4TB 7.2K RPM SAS-12GBPS Hard Drive

The Dell 400-ATKL 4TB 7.2K RPM SAS 12Gbps 512N LFF Hard Drive represents a high-capacity enterprise storage category designed for scalable server infrastructures, bulk data storage environments, and cost-efficient data center expansion. Built for reliability, compatibility, and sustained performance, this category of large form factor (LFF) SAS drives is widely deployed in enterprise storage arrays where capacity density and long-term data retention are prioritized over ultra-low latency performance.

With a 4TB storage capacity, 7,200 RPM spindle speed, and 12Gbps SAS interface, the Dell 400-ATKL category is engineered to support workloads that require large sequential data throughput, dependable storage consistency, and enterprise-grade durability. It is especially suitable for backup systems, archival storage, cloud repositories, and general-purpose server environments where balancing cost and performance is essential.

Speed: 7200 RPM 

The 7,200 RPM spindle speed is a standard in enterprise SATA and SAS hybrid storage environments, offering a balanced mix of performance, energy efficiency, and cost-effectiveness. While not designed for ultra-low latency workloads, it provides reliable throughput for sequential data operations and bulk storage tasks.

The Dell 400-ATKL category excels in sequential read and write operations, making it ideal for workloads such as backup processing, media storage, log archiving, and large dataset handling. These use cases benefit significantly from sustained throughput rather than random IOPS performance.

Enterprise-grade 7.2K RPM drives are engineered for continuous operation in data center environments. They maintain consistent performance under sustained workloads, ensuring predictable system behavior and reducing variability in storage performance over time.

Data Transfer Capability

The SAS 12Gbps interface enables high-speed communication between the storage drive and server systems. This ensures efficient data transfer and reduces bottlenecks in multi-drive configurations, making it suitable for large-scale enterprise storage arrays.SAS technology offers superior reliability compared to SATA, including dual-port connectivity, enhanced error detection, and improved command handling. These features ensure higher availability and resilience in mission-critical environments.

SAS drives support advanced command queuing mechanisms that optimize read and write operations, improving efficiency in environments with concurrent data access requests.

Data Compatibility

The 512N format ensures compatibility with legacy systems that rely on traditional 512-byte sector structures. This eliminates the need for translation layers and simplifies integration into existing enterprise infrastructure.By using native sector formatting, the drive avoids additional processing overhead associated with emulation, resulting in improved performance efficiency and reduced latency.

512N drives allow for smoother migration from older storage systems, ensuring compatibility across a wide range of enterprise applications and server environments.

Form Factor Storage

The 4TB capacity provides a strong balance between storage density and cost efficiency, making it ideal for enterprise environments that require large-scale data storage without excessive infrastructure complexity.This capacity tier is commonly used for bulk storage applications such as archival systems, backup repositories, and cold data storage layers where performance requirements are moderate.

The Dell 400-ATKL category is designed for scalable storage environments, allowing organizations to expand capacity by adding multiple drives into RAID arrays or storage enclosures.

Form Factor (LFF) Design Benefits

The 3.5-inch LFF design allows for larger platters, enabling higher storage capacity per drive compared to smaller form factor alternatives. This is essential for maximizing storage density in enterprise systems.LFF drives are widely used in storage arrays where maximizing capacity per rack unit is important. They reduce the number of drives required for large datasets, simplifying infrastructure management.

Large form factor drives typically offer lower cost per gigabyte compared to smaller, high-performance drives, making them ideal for budget-conscious enterprise storage expansion.

Hot-Plug Functionality 

Hot-plug support allows administrators to replace or install drives without shutting down the server. This ensures continuous system availability in enterprise environments where downtime must be minimized.Hot-plug functionality enables dynamic storage management, allowing drives to be added or replaced without interrupting active workloads.

This feature significantly reduces maintenance windows and simplifies hardware servicing in large-scale data center environments.

System Integration

The Dell 400-ATKL hard drive is designed for seamless integration with Dell PowerEdge servers, ensuring compatibility with firmware, RAID controllers, and system backplanes.These drives support multiple RAID configurations, including RAID 0, RAID 1, RAID 5, RAID 6, and RAID 10, allowing organizations to tailor storage performance and redundancy based on workload requirements.

When paired with Dell RAID controllers, the drives benefit from caching, error correction, and performance optimization features that improve overall system efficiency.

Reliability and Durability

The Dell 400-ATKL drives are engineered for continuous operation in enterprise environments, ensuring long-term reliability and consistent performance.Built-in error correction mechanisms ensure data integrity and reduce the risk of corruption during read and write operations.

These drives are designed to withstand vibration in multi-drive configurations, ensuring stable operation in high-density storage arrays.

Scalability and Data Center Optimization

Organizations can scale storage systems efficiently by adding additional Dell 400-ATKL drives to meet growing data demands.Workloads can be distributed across multiple drives to improve performance and reduce wear on individual components.These drives are commonly used in tiered storage environments as capacity-focused layers within hybrid infrastructures.