WD 18TB UltraStar DC HC550 7200 rpm SATA III 3.5 Internal HDD

Highlights
18TB 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
Industry’s first Triple Stage Actuator
HelioSeal design delivers outstanding power efficiency
2.5M hours (projected) MTBF rating & 5-year limited warranty
Self-Encrypting Drive Options

Applications
Cloud & Hyperscale storage
Massive scale-out (MSO), high-density data centers
Distributed File Systems
Bulk storage using object storage solutions like Ceph and OpenStack Swift
Primary and secondary storage for Apache Hadoop for Big Data Analytics

Total Cost of Ownership (TCO) Drives the Data Center Architecture
Data center decisions are driven by TCO. Higher capacity hard drives play a leading role in reducing TCO. An 18TB data center HDD provides 29% more capacity in the same form factor as a 14TB HDD. Higher capacity HDDs enable data centers to lower CapEx by reducing supporting hardware and system level costs when compared to lower capacity
drives. Helium-sealed, low power, high reliability drives reduce energy and maintenance costs, contributing to OpEx savings. For example, a data center using 18TB HDDs vs. 14TB HDDs requires 22% fewer racks while consuming 21% less power per TB at idle, resulting in significant overall TCO reduction for data center environments.

Raising the Capacity Bar with New Technologies
Ultrastar DC HC550 integrates a suite of technologies on a 9-disk platform to create a new class of HDDs. 18TB capacity is achieved by combining technologies that improve areal density working together with technologies that improve performance and reduce power consumption.
The first HDD in the industry to harness Energy-Assisted Magnetic Recording (EAMR) technology improves writability and therefore increases areal density.
The industry’s first Triple Stage Actuator (TSA) enhances head-positioning accuracy, delivering better performance and increased areal density.
HelioSeal technology is the foundation for Western Digital’s high capacity HDDs and this is the 6th generation of HelioSeal product. Western Digital has shipped >65 million HelioSeal products to date.

Trusted Reliability and Quality for Data at Scale
With its massive capacity and 2.5M MTBF (projected) reliability rating, the Ultrastar DC HC550 is ideal for object storage implementations. Object storage systems with erasure coding provide better data durability compared to RAID systems, given their tolerance for simultaneous error conditions.
The DC HC550 offers security and encryption options to help protect data from unauthorized use, including SED models in both SATA & SAS. A SED-FIPS will be available in a SAS configuration.
Trust Western Digital and the Ultrastar DC HC550 hard drive to deliver highest capacity, lower TCO and more value to your data center.

Features and Benefits
Capacity : 18TB, enabled by EAMR
Power Efficiency : Ultra-low Watts per Terabyte (W/TB)

Performance :
Triple Stage Actuator and Two-Dimensional Magnetic Recording (TDMR) technology
Rotational Vibration Safeguard (RVS)
Media Cache Plus architecture
SATA 6Gb/s & SAS 12Gb/s
512MB cache buffer

Reliability :
Dual Safe, RSA-signed firmware
2.5M hours MTBF and 0.35% AFR
5-year limited warranty

Data Security
Encryption options on both SATA and SAS models

Benefits
Provides 29% more capacity than 14TB helium-filled drives
21% lower idle W/TB than 14TB Ultrastar helium-filled drives
More accurate head positioning, especially in multi-drive environments, for better performance and data integrity
Maintains drive performance in high rotational vibration environments and multi-drive systems
Better random write performance
Provides compatibility with high-performance data centers
Improves response time and data management
Retains previous firmware version for safe firmware updates, verified with an RSA signature
Unsurpassed reliability rating for Capacity Enterprise HDD for fewer failures/less service needs
Unbeaten for enterprise-class hard drives
Hardware-based encryption helps protect data from unauthorized use (SED options)

Specifications
Model Numbers : WUH721818ALE6L4
Interface : SATA 6Gb/s
Capacity : 18TB
Format: Sector size (bytes) 4Kn: 4096, 512e: 512
Areal Density (Gbits/sq. in, max) : 918 (16TB)

Performance
Data buffer : (MB) 512
Rotational speed (RPM) : 7200
Latency average (ms) : 4.16
Interface transfer rate (MB/s, max) : 600
Sustained transfer rate (MB/s, max) / (MiB/s, max) : 269/257 (18TB)

Reliability
Error rate (non-recoverable bits read) : 1 in 10
Load/Unload cycles (at 40°C) : 600,000
Availability (hrs/day x days/wk) : 24x7
MTBF (M hours, projected) : 2.5
Annualized Failure Rate (AFR, projected) : 0.35%
Workloads : Up to 550 TB/year
Limited warranty (yrs) : 5

Acoustics
Idle/Operating (Bels, typical) : 2.0/3.6

Power
Requirement : +5 VDC, +12VDC
Operating : (W) 6.5
Idle : (W) 5.6
Power consumption efficiency at idle (W/TB) : 0.35

Physical Size
z-height (mm) : 26.1
Dimensions (width x depth, mm) : 101.6 (+/-0.25) x 147
Weight (g, max) : 690

Environmental (Operating)
Ambient temperature : 5° to 60°C
Shock (half-sine wave, 2ms, G) : 50
Vibration (G RMS, 5 to 500Hz) : 0.67 (XYZ)

Environmental (Non-operating)
Ambient temperature : -40° to 70°C
Shock (half-sine wave, 2ms, G) : 250 (2ms)
Vibration (G RMS, 2 to 200Hz) : 1.04 (XYZ)

What's in the box
WD 18TB UltraStar DC HC550 7200 rpm SATA III 3.5" Internal HDD
Limited 5-Year Warranty