Seagate Exos X18 16TB 3.5" 7200RPM SAS III 12 Gb/s Internal HDD

Overview

The Seagate ST16000NM004J is a 3.5-inch internal hard drive designed to provide 16TB of storage capacity using conventional magnetic recording. It operates at 7200 rpm and connects via a SAS III interface rated at 12 Gb/s, enabling sustained data transfer speeds up to 261 MB/s. This drive is built for continuous operation in demanding environments such as data centers and high-density storage arrays, offering a balance of performance, capacity, and reliability.

Key features

• High-capacity 16TB storage suitable for large-scale data archiving and analytics workloads
• SAS III 12 Gb/s interface ensures fast and reliable data transfer for enterprise applications
• 7200 rpm spindle speed combined with an average latency of 4.16 ms delivers responsive access to stored data
• 256MB cache enhances data throughput and smooths performance during heavy workloads
• PowerBalance technology optimizes power consumption without sacrificing throughput under load
• PowerChoice feature allows configurable idle states to improve energy efficiency across multiple drives
• Helium-sealed design reduces internal friction and vibration, supporting long-term reliability in dense rack environments
• Integrated digital sensors monitor temperature and drive health to help prevent downtime
• Compatibility with both 512e and 4Kn sector formats simplifies integration into mixed storage environments

Key specs

• Capacity: 16TB
• Form factor: 3.5 inches
• Interface: SAS III 12 Gb/s
• Spindle speed: 7200 rpm
• Sustained data transfer rate: up to 261 MB/s
• Cache size: 256MB
• Average latency: 4.16 ms
• Mean time between failures (MTBF): 2.5 million hours
• Sector formats supported: 512e and 4Kn

Connectivity and compatibility

This drive uses a SAS III interface running at 12 Gb/s, which is common in enterprise storage systems and servers. Its support for both 512e and 4Kn sector formats allows it to work seamlessly in environments with mixed legacy and modern storage configurations. The 3.5-inch form factor fits standard drive bays in rack-mounted servers and storage arrays.

Performance and reliability

The combination of a 7200 rpm spindle speed and a large 256MB cache helps maintain consistent performance during intensive read/write operations. The helium-sealed design reduces turbulence inside the drive, lowering friction and vibration, which contributes to the drive’s long 2.5 million hour MTBF rating. These features make it well suited for continuous operation in data centers where uptime and durability are critical.

Ideal uses and environments

This hard drive is a strong choice for cloud data centers, hyperscale clusters, and high-density RAID systems that require large storage capacity with reliable and efficient performance. It fits well in setups focused on video archiving, big data analytics, and enterprise backup solutions where sustained throughput and power efficiency are important considerations.