Seagate ST4000NM0023 Enterprise Hard Disk Drive

Seagate ST4000NM0023 Constellation ES.3 is a 4 TB, 3.5-inch enterprise hard disk drive designed for data-center workloads. Spinning at 7,200 RPM with a 128 MB cache, it uses a SAS 6 Gb/s interface with two ports and delivers a maximum sustained data transfer rate up to 175 MB/s. As part of the Constellation ES.3 family, it supports Protection Information (T10 DIF), a humidity sensor, and PowerChoice technology, and it uses 512/520/528-byte sectors. The drive is rated for 8,760 hours per year of operation, with a mean time between failures (MTBF) of 2.0 million hours and an annualized failure rate (AFR) of 0.44%, making it suitable for 24x7 data-center deployments such as RAID arrays, server storage, cloud storage, and archival workloads. It carries a 5-year limited warranty and operates in environments from 5°C to 60°C.