400-ATKM Dell 4TB 7.2K RPM SAS 12GBPS 512N LFF HDD

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

The Dell 400-ATKM is a dependable 4TB nearline enterprise hard drive engineered for scalable data center environments. With SAS 12Gb/s connectivity and 7200 RPM rotational speed, it provides stable performance, efficient data handling, and reliable long-term storage for enterprise workloads.

Product Information

• Brand: Dell
• Dell Part Number: 400-ATKM
• Manufacturer Part Number: FW4KG
• 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 solution

Performance

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

Advantages

• 7200 RPM spindle speed ensures stable and consistent performance
• SAS 12Gb/s interface delivers strong bandwidth and reliability
• Ideal for backup, archival, and general enterprise storage workloads

Reliability

• Hot-plug capability enables maintenance without downtime
• Built for continuous 24/7 enterprise operation
• Supports scalable and high-density server deployments

Physical Design

• 3.5-inch LFF enterprise-grade form factor
• Pre-mounted tray for simplified installation
• Optimized for rack-mounted server environments

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 7.2K RPM SAS 12GBPS 512N LFF Hard Disk Drive 

The Dell 400-ATKM 4TB 7.2K RPM SAS 12Gbps 512N LFF Hard Disk Drive category represents a high-capacity enterprise storage solution designed for scalable data center environments, server-based storage arrays, and long-term data retention systems. This category is engineered to support workloads that require large storage capacity, consistent reliability, and cost-efficient expansion within Dell enterprise server ecosystems. Built with a 3.5-inch Large Form Factor (LFF) design and SAS 12Gbps interface, it delivers a balance of capacity, performance stability, and enterprise-grade durability.

With a 4TB storage capacity and 7200 RPM rotational speed, this drive category is optimized for bulk data storage, backup repositories, archival systems, and general-purpose enterprise workloads. It is commonly deployed in environments where high-speed transactional performance is not the primary requirement, but where storage scalability, reliability, and predictable throughput are essential for business continuity.

Speed:7200 RPM 

The 7200 RPM spindle speed is widely adopted in enterprise SATA and SAS hybrid storage solutions due to its balance between performance, power efficiency, and cost per terabyte. The Dell 400-ATKM category leverages this rotational speed to deliver stable and consistent performance for sequential workloads and large-scale data storage applications.This category of hard drives performs exceptionally well in sequential read and write operations, making it ideal for applications such as backup processing, media storage, log archiving, and data warehousing. Sequential workloads benefit from sustained throughput rather than ultra-low latency performance.

Enterprise-grade 7200 RPM drives are designed for continuous 24/7 operation. The Dell 400-ATKM ensures consistent performance over long periods, making it suitable for mission-critical environments where reliability and uptime are essential.

Interface: SAS 12Gbps 

The SAS 12Gbps interface provides a high-bandwidth connection between the storage drive and server systems. This enables efficient data transfer, reduces bottlenecks, and supports scalable storage environments with multiple drives operating simultaneously.SAS technology includes dual-port connectivity, allowing the drive to connect to multiple controllers or data paths. This enhances system redundancy and ensures continuous data availability in case of hardware or path failures.

SAS drives support advanced command queuing and error handling mechanisms that optimize read and write operations. This improves efficiency in environments with concurrent workloads and multiple active processes.

Data Compatibility

The 512N format ensures compatibility with legacy systems and applications that rely on traditional 512-byte sector structures. This simplifies integration into existing infrastructure without requiring translation layers or additional processing overhead.By using native sector formatting, the drive minimizes computational overhead associated with sector emulation, improving performance efficiency and reducing latency in data operations.

The 512N format enables smooth migration from older storage systems, ensuring compatibility across a wide range of enterprise applications and server environments.

Form Factor Design

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

The Dell 400-ATKM category supports scalable deployment in RAID arrays and storage enclosures, allowing organizations to expand storage capacity as data requirements grow.

Form Factor (LFF) Advantages

The 3.5-inch LFF design allows for larger disk platters, enabling higher storage capacity per drive compared to smaller form factors. This improves storage efficiency in enterprise systems.By using high-capacity LFF drives, organizations can reduce the number of physical drives required, simplifying infrastructure management and reducing hardware complexity.

LFF drives offer a lower cost per terabyte 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, ensuring continuous system availability and minimizing downtime.Hot-plug functionality enables flexible storage management, allowing drives to be added or replaced dynamically in live environments.

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

Compatibility 

The Dell 400-ATKM drive is designed for seamless integration with Dell PowerEdge servers, ensuring full compatibility with firmware, backplanes, and RAID controllers.These drives support multiple RAID levels including RAID 0, RAID 1, RAID 5, RAID 6, and RAID 10, allowing organizations to balance performance, redundancy, and storage efficiency.

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

Reliability and  Durability

The Dell 400-ATKM drives are engineered for continuous operation in enterprise environments, ensuring long-term reliability and consistent performance.Built-in error correction systems 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 systems.

Scalability and Data Center Optimization

Organizations can scale storage infrastructure efficiently by adding additional Dell 400-ATKM drives as data requirements increase.Workloads can be distributed across multiple drives to optimize performance and reduce wear on individual components.These drives are commonly used in tiered storage architectures as capacity-focused layers within hybrid systems.