DELL COMPELLENT ST4000NM0023 4TB 7.2K SAS 3.5" internal hard drive

4 TB SAS drive for nearline storage

The Dell Compellent ST4000NM0023 is a 4 TB 3.5 inch internal hard drive built for nearline SAS environments. It spins at 7200 RPM and provides a 128 MB cache to smooth sustained workloads. The drive is supplied new and targets arrays that need high capacity with enterprise SAS connectivity.

SAS 6 Gb/s interface practical limits

The 6 Gb/s SAS link caps maximum throughput at the interface level, so sequential transfers cannot exceed that bandwidth. Random I/O performance will depend on the controller and queue depth rather than the drive alone. Systems limited to 3 Gb/s backplanes will operate at the lower speed. Workloads demanding higher sustained throughput need a faster interface generation.

128 MB cache and 3.5 inch SAS connector implications

The 128 MB buffer helps absorb write bursts and reduces rotational latency during mixed read-write patterns. Standard 3.5 inch SAS power and data connectors fit common hot-swap trays and backplanes without adapters. At 2.0 pound the drive seats securely in enterprise chassis. The 90 day warranty period reflects the supplier's coverage for this unit.