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Dell 2TB SAS 6G 7.2K RPM LFF 3.5 HDD Constellation ST2000NM0023 0T7F78 T7F78

Dell 2TB SAS 6G 7.2K RPM LFF 3.5 HDD Constellation ST2000NM0023 0T7F78 T7F78

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SKU T7F78
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  • Specifications
  • Description
Manufacturer Part Number 0T7F78 T7F78
Manufacturer Dell
Condition Refurbished
Standard Warranty 90 Day Replacement Warranty
Item Category SAS Hard Drives
Model ST2000NM0023
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Dell 2TB SAS 6G 7.2K RPM LFF 3.5 HDD Constellation ST2000NM0023

The Dell 2TB SAS 6Gb/s 7.2K RPM 3.5-inch Hard Drive (0T7F78 / T7F78) is an enterprise-grade storage solution designed for Dell PowerEdge servers and enterprise storage arrays. Based on the reliable Seagate Constellation ES.3 platform (model ST2000NM0023), this drive delivers dependable performance, high durability, and consistent data throughput for demanding data center workloads.

With a 2TB capacity, 7200 RPM rotational speed, and SAS 6Gb/s interface, this drive is engineered for 24/7 enterprise environments, including virtualization infrastructure, cloud platforms, backup systems, and large-scale storage deployments. The SAS interface provides improved reliability and faster communication compared to SATA drives, making it ideal for multi-drive server environments.

This drive typically ships with a Dell hot-swap tray, allowing quick replacement and maintenance without powering down the server, helping minimize downtime in mission-critical systems.

Key Features

  • Enterprise-class 2TB storage capacity

  • SAS 6Gb/s interface for reliable server connectivity

  • 7200 RPM spindle speed for balanced performance and capacity

  • Designed for 24/7 continuous operation

  • Hot-swap support in compatible Dell PowerEdge servers

  • Built on the Seagate Constellation ES.3 enterprise platform

  • Optimized for multi-drive RAID storage environments

Technical Specifications

  • Model: Seagate Constellation ES.3

  • Manufacturer Model: ST2000NM0023

  • Dell Part Number: 0T7F78 / T7F78

  • Capacity: 2TB

  • Interface: SAS 6Gb/s (Serial Attached SCSI)

  • Form Factor: 3.5-inch LFF

  • Rotational Speed: 7,200 RPM

  • Cache: 128MB

  • Sector Format: 512n (Native 512-byte sectors)

  • Maximum Sustained Transfer Rate: Up to 175 MB/s

  • Average Latency: 4.16 ms

  • MTBF: Up to 2 million hours

  • Power Management: T10-compliant PowerChoice technology

Enterprise Reliability

The Seagate Constellation ES.3 architecture is designed specifically for high-density enterprise storage systems. The drive includes advanced vibration tolerance and error correction technologies, ensuring stable operation in server environments with multiple drives operating simultaneously.

Additional enterprise features include:

  • Rotational Vibration (RV) tolerance for multi-drive chassis

  • PowerChoice energy management for improved efficiency

  • Integrated environmental monitoring sensors

These features help maintain consistent performance and reliability in enterprise storage environments.

Server Compatibility

This drive is validated for use in many Dell PowerEdge servers and storage systems, including:

  • Dell PowerEdge R310

  • Dell PowerEdge R420

  • Dell PowerEdge R510

  • Dell PowerEdge R710

  • Dell PowerEdge R720

  • Dell PowerEdge T420

  • Dell PowerEdge T620

It is also commonly used in Dell EqualLogic PS Series and Dell Compellent storage arrays.

Typical Use Cases

This enterprise HDD is ideal for:

  • Data center storage arrays

  • Virtualization infrastructure

  • Backup and archival systems

  • Enterprise file servers

  • RAID storage environments

  • High-capacity storage expansion

Other Related Part Numbers

The Dell 2TB SAS Constellation ES.3 drive may also be referenced under the following part numbers from Dell, Seagate, or enterprise storage vendors:

ST2000NM0023, 0T7F78, T7F78, 9ZM275-157, 118033059

These part numbers represent OEM versions, firmware variants, or distribution SKUs that correspond to the same core enterprise drive specifications (2TB capacity, SAS 6Gb/s interface, 7200 RPM, and 3.5-inch LFF form factor) and are generally considered functionally equivalent when used in compatible systems.