Ultrastar DC HC550
16TB Provides 14% more capacity than 14TB helium-filled drives
Triple Stage Actuator and Two-Dimensional Magnetic Recording (TDMR) technology More 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 architecture Better random write performance
512MB cache buffer Improves response time and data management
Dual Safe, RSA-signed firmware Retains previous firmware version for safe firmware updates, verified with an RSA signature
2.5M hours MTBF and 0.35% AFR Unsurpassed reliability rating for Capacity Enterprise HDD for fewer failures/less service needs

Highlights 16TB capacity in a standard 3.5-inch form factor CMR technology works with all capacity enterprise applications & environments Reliable, field-proven, 6th generation design Industry’s first HDD with Energy-Assisted Magnetic Recording technology improves writability and therefore increases areal density Industry’s first Triple Stage Actuator enhances head-positioning accuracy, delivering better performance and increased areal density HelioSeal design delivers outstanding power efficiency 2.5M hours (projected) MTBF rating 512e SATA 6Gb/s Legacy Pin 3 config – no power disable support Base (SE), no encryption. Sanitize overwrite only

Applications Cloud & Hyperscale storage Massive scale-out (MSO), high-density data centers Distributed File Systems
16TB capacity in a standard 3.5" form factor
Energy-Assisted Magnetic Recording (EAMR) technology improves writability
Triple Stage Actuator (TSA) enhances head-positioning accuracy
HelioSeal technology is the foundation for Western Digital’s high capacity hard drives
512MB cache buffer improves response time and data management