Seagate Constellation ES.3 ST2000NM0033 9ZM175-038 2TB 7200RPM 128MB 3.5" SATA internal hard drive

Enterprise Storage Drive

The Seagate Constellation ES.3 ST2000NM0033 is a 2000GB 3.5-inch internal hard drive built for continuous operation in servers and storage arrays. Its 7200RPM spindle speed and 128MB cache support sustained throughput for multi-user workloads. The SATA 6Gb/s interface connects directly to standard host controllers. This new drive suits IT managers expanding nearline capacity.

SATA 6Gb/s Interface Limit

The SATA 6Gb/s link caps burst transfer at the interface ceiling, so sustained rates depend on the mechanical media rather than the bus. Sequential throughput will not exceed the physical limits of the 7200RPM platters. Random I/O performance is constrained by rotational latency and seek time inherent to the design. The interface adds no protocol overhead beyond standard SATA signalling.

Capacity and Workload Fit

Two terabytes provide room for archival datasets, backup targets and virtual machine libraries that do not demand flash latency. The 128MB buffer absorbs write bursts from RAID controllers during rebuilds or logging spikes. Very high queue-depth random workloads will saturate the actuator before the cache or interface becomes the bottleneck. Buyers needing lower latency or higher IOPS should consider solid-state alternatives.