WD Ultrastar DC HC550 WUH721818ALE6L4 hard drive - 18 TB - SATA 6Gb/s

18????, enabled by EAMRProvides 29% more capacity than 14TB helium-filled drives. Ultra-low Watts per Terabyte (W/TB)21% lower idle W/TB than 14TB Ultrastar helium-filled drives. Triple Stage Actuator and Two-Dimensional Magnetic Recording (TDMR) technologyMore accurate head positioning, especially in multi-drive environments, for better performance and data integrity. Rotational Vibration Safeguard (RVS)Maintains drive performance in high rotational vibration environments and multi-drive systems. Media Cache Plus architectureBetter random write performance. SATA 6Gb/s & SAS 12Gb/sProvides compatibility with high-performance data centers. 512MB cache bufferImproves response time and data management. Dual Safe, RSA-signed firmwareRetains previous firmware version for safe firmware updates, verified with an RSA signature. 2.5M hours MTBF and 0.35% AFRUnsurpassed reliability rating for Capacity Enterprise HDD for fewer failures/less service needs. Industry's first Energy-Assisted Magnetic Recording technology...