**WD RE® (Nearline Class Enterprise Drives)** Fast, reliable & enterprise-ready. Ideal for: Servers, video surveillance, & other demanding write-intensive applications,
- Massive 4 TB capacity
- High performance technology
- 24x 7 reliability
- Dual actuator technology
- Stable Trac
- The motor shaft is secured at both ends to reduce system-induced vibration & stabilize platters for accurate tracking during read & write operations. WD RE4 7200 RPM Enterprise SATA hard drives offer massive 4 TB capacity loaded with performance & reliability features ideal for servers, video surveillance, & other demanding write-intensive applications. With a designed, manufactured & demonstrated MTBF of 1.2 million hours at 100% duty cycle in nominal enterprise conditions, 64 MB cache, & best-in-class vibration tolerance, these drives are the ultimate in Enterprise SATA storage. Backed by a 5-year limited warranty.