Seagate Enterprise Capacity 4TB 3.5" 7200RPM SAS 6 Gb/s Internal HDD

The Seagate ST4000NM0034 is a 3.5 inch internal hard drive built for servers and storage systems that need dependable, high-capacity space. With room for 4TB of data, it fits easily into standard SAS backplanes and provides the throughput expected in modern data centers.

The drive connects through a SAS interface that supports up to 12 Gb/s while staying backward compatible with 6 Gb/s gear. A 7200 rpm spindle speed, paired with a 128 MB cache, helps it sustain transfers up to 226 MB/s, so tasks such as large backup jobs or intensive database queries finish sooner and free resources for the next workload.

Reliability is at the heart of the design. A rated 2 million hours mean time between failures and an annual workload limit of 550 TB allow continuous 24×7 operation. Dual onboard processors and built-in rotational vibration sensors maintain consistent performance in multi-drive enclosures, while PowerChoice firmware features let administrators curb energy draw when demand is low, keeping operating costs under control.

Typical deployments include RAID arrays that serve virtual machines, scale-out file servers, and backup targets that must stay online without pause. System builders who support video surveillance, content streaming, or private cloud storage can also rely on this model for predictable, long-term service.

• 4TB capacity suited for expanding server or NAS storage pools
• SAS interface supports 12 Gb/s and works with 6 Gb/s systems
• 7200 rpm spindle speed and 128 MB cache deliver up to 226 MB/s sustained transfers
• Rated for 550 TB of data writes per year in nonstop operation
• 2 million hours MTBF with a 0.44 percent annualized failure rate
• Dual processors and rotational vibration sensors maintain performance in multi-drive racks
• PowerChoice technology helps reduce power and heat when demand is low