HGST Ultrastar 7K4000 Specifications
The HGST Ultrastar 7K4000 provides an average seek latency of 8.0ms and a sustained transfer rate of 172 MB/s for the SAS model, and 181/172 MB/s for the SATA models. This is delivered via a 6Gb/s connection and a 7,200 RPM speed. The Ultrastar 7K4000 series of HDDs comes in a standard 3.5" form factor.
For typical workloads, the drive pulls an average of 11.4 watts for read/write workloads, 6.9 Watts at idle and 5.7 Watts unload idle. Advanced Power Management allows five different modes to customize power characteristics. Some sleep and standby states pull as low as 1 Watt, creating a great option for cold data storage and replication environments.
The HGST naming convention can be a bit daunting for those unaccustomed to the nomenclature, but the specification sheet above has a handy decoder to the left of the chart. Models with encryption capabilities feature Bulk Data Encryption for SATA models and TCG Enterprise_A for SAS.
HGST has certified the Ultrastar 7K4000 as an EcoTrac design, denoting a halogen-free design and power inefficient operation.
The MTBF is rating pops out at a whopping two million hours, and there is a load/unload rating of 600,000 cycles. The HUS724040ALS64 series of HDDs is designed for an always-on usage model and is backed by a five year warranty.