Designed with SMB customers in mind, the 4TB Red Pro 7200 rpm SATA III 3.5" Internal NAS HDD from WD is well-suited for medium to large-scale NAS environments with up to sixteen 3.5" drive bays. Engineered to handle increased workloads, this 4TB drive operates using a SATA III 6 Gb/s interface, a 256MB cache, and a rotational speed of 7200 rpm, which all help to ensure uninterrupted data transfers with a sustained rate of up to 217 MB/s. This drive also features high levels of reliability, with 600,000 load/unload cycles, 14 non-recoverable read errors per bits read, a workload rate of 300TB per years, dual-plane balance control technology, and 1 million hours MTBF for 8-16 bay NAS systems.

See recent price change history for the WD 4TB Red Pro 7200 rpm SATA III 3.5" Internal NAS HDD.