WD Red Pro 4TB NAS 3.5" Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, CMR, 256MB Cache

Designed specifically with medium or large scale business customers in mind, WD Red Pro drives are available for up to 24-bay NAS systems. Engineered to handle high-intensity workloads in 24x7 environments, WD Red Pro is ideal for archiving and sharing, as well as RAID array rebuilding on extended operating systems such as ZFS or other file systems. These drives add value to your business by enabling your employees to quickly share their files and back-up folders reliably in your NAS solution. 7200RPM performance class and 5-year limited warranty Available in capacities ranging from 2-22TB with support for up to 24 bays Supports up to 300TB/yr workload rate Enhanced reliability with 3D Active Balance Plus technology and error recovery controls with NASware 3.0 technology