Seagate Exos 4TB Enterprise Hard Drive (ST4000NM025B) – SATA 6Gb/s, 7200 RPM, 256MB Cache, CMR

The Seagate Exos 4TB (ST4000NM025B) is a 3.5-inch enterprise hard drive for servers, data centers, large NAS arrays and homelab builders. 7200 RPM operation, SATA 6Gb/s connectivity and a 550TB/year workload rating deliver dependable 24/7 capacity. It is a strong fit for backup targets, virtualization hosts and scale-out storage.

Enterprise capacity built for always-on servers.

Why Enterprise Workloads Need Enterprise-Rated Drives

Servers, backup targets and large NAS arrays run 24/7, with drives sharing vibration and heat in dense chassis. Desktop and entry NAS drives are not rated for that duty cycle, which leads to timeouts, degraded arrays and costly downtime.

The Seagate Exos 4TB is designed for enterprise workloads, with a 550TB/year rating and firmware tuned for RAID controllers. At 4TB, it covers mainstream enterprise storage capacity needs – shared files, databases or rolling backups – without paying for capacity you will not use. The SATA 6Gb/s interface is backward compatible with SATA 3Gb/s ports and works with standard SATA controllers, NAS bays and server backplanes.

High Capacity per Bay

At 4TB, the drive reduces the number of bays and spindles needed for the same usable capacity, lowering power and cooling per terabyte.

Enterprise Reliability and Monitoring

Rated for 24/7 operation with enterprise workload figures, the drive reports detailed S.M.A.R.T. data for proactive replacement in servers and arrays.

Setup Instructions

How to Install the Seagate Exos 4TB

1. Verify your server, NAS or HBA supports 3.5-inch SATA 6Gb/s drives at this capacity.
2. Mount the drive in the correct carrier or tray.
3. Insert into the bay (hot-swap if supported) and confirm it appears in the controller or OS.
4. Add it to a RAID group, ZFS pool or storage volume and enable health monitoring.