Seagate ST4000NM0063 Constellation 4 TB Hard Drive - 3.5 - SAS - 7200 - 128 MB

Seagate® Constellation™ ES fourth-generation drives are among the highest-capacity drives available and are the only 6Gb/s SAS nearline hard drives on the market. These drives feature enterprise-class reliability and power and performance efficiencies, making them ideal for business-critical, 24x7 multi-drive server and storage environments.