WD Red Pro 3.5" 18TB, 7200 RPM, 512MB, SATA III Hard Drive for NAS

The Western Digital Red Pro WD181KFGX is a 3.5-inch internal hard drive providing 18 TB of storage capacity. It is engineered for use in medium to large multi-bay network-attached storage (NAS) systems that require continuous, 24/7 operation. The drive connects via a standard SATA 6 Gbit/s interface, ensuring compatibility with a wide range of server and storage hardware. Its design prioritizes sustained performance and reliability for demanding data access and archival workloads typical in business environments.

This model operates at a spindle speed of 7200 RPM and includes a 512 MB cache to facilitate faster data retrieval and write operations. To maintain consistent performance in multi-drive configurations, it is equipped with Rotational Vibration (RV) sensors that detect and correct for vibration in real time. The drive also supports S.M.A.R.T. technology for monitoring drive health, a key feature for system administrators managing critical data integrity and uptime in professional storage arrays.

• 18 TB storage capacity
• 3.5-inch form factor
• SATA 6 Gbit/s interface
• 7200 RPM spindle speed
• 512 MB cache size
• Engineered for NAS system compatibility
• Supports 24/7 continuous operation
• Includes Rotational Vibration (RV) sensors
• S.M.A.R.T. drive monitoring supported
• Mean Time Between Failures (MTBF) of 1,000,000 hours
• Dimensions of 101.6 x 147 x 26.1 mm
• Weighs 690 g