DELL 400-AEQT 4TB 3.5" SAS 12Gb/s 7200 RPM internal hard drive

Dell 400-AEQT 4TB Nearline SAS Drive

The Dell 400-AEQT is a 4TB 3.5-inch internal hard drive built for nearline storage workloads. It connects through a 12Gb/s SAS interface and spins at 7200 RPM. The bare-drive packaging suits system integrators and IT teams expanding array capacity in compatible Dell servers or storage enclosures.

Capacity and headroom for nearline workloads

Four terabytes provide substantial space for bulk data, backups and archival tasks that do not demand low-latency flash. The 7200 RPM spindle delivers consistent sequential throughput for streaming reads and writes, while the 12Gb/s SAS link offers ample bus headroom for multiple drives on a single controller. Random I/O performance will saturate well before the interface does, so workloads heavy on small-block access should plan accordingly.

Upgrade path from smaller nearline SAS drives

This drive replaces lower-capacity 3.5-inch nearline SAS units such as 1TB or 2TB models when storage density must increase without adding bays. The jump is worthwhile when the controller and backplane already support 12Gb/s SAS and the workload tolerates mechanical latency. Buyers needing higher IOPS or lower power per terabyte should evaluate solid-state alternatives instead.