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    25+ years experience
    Founded in 1992 to target the emerging mobile computing market, Clove Technology has grown and adapted into what you see today.

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    25+ Years experience
    Founded in 1992
    Western Digital Ultrastar DC HC550 - SAS 3.5" HDD - 18 TB

    Western Digital Ultrastar DC HC550 - SAS 3.5" HDD - 18 TB

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    Key Features

    • 18TB/16TB capacity in a standard 3.5-inch form factor
    • Industry’s first Energy-Assisted Magnetic Recording technology
    • Industry’s first Triple Stage Actuator
    • Leading HelioSeal technology
    • Reliable, field-proven design across five generations
    • HelioSeal design delivers power efficiency (Watts/TB)
    • 2.5M hours MTBF rating

    18 TB, SAS 12 Gb/s, 512e, Base(SE)

    Ultrastar DC HC500 Series

    High Capacity for Massive Data and Lower Total Cost of Ownership

    Driving Up Capacity and Driving Down TCO for Cloud and Hyperscale Data Centers

    The breadth and depth of Big Data is driving the universal need for higher capacities across a broad spectrum of applications and workloads. Laying the foundation for a worry-free data center, Western Digital delivers the capacity to conquer the data explosion with the Ultrastar DC HC500 series of hard disk drives (HDDs). The DC HC500 series is designed for public and private cloud environments where storage density and cost-efficient infrastructure is critical.

    The 18TB/16TB Ultrastar DC HC550 HDDs are the first commercial implementation of Energy-Assisted Magnetic Recording technology and utilize the industry’s first Triple Stage Actuator. These technologies, integrated with HelioSeal on a 9-disk platform, deliver the highest areal density and unmatched Total Cost of Ownership for customer and market needs.

    Solves TCO Challenges
    - High Capacity
    Up to 18TB HDDs, drop-in ready for Big Data workloads
    - Low Power
    Up to 61% lower idle W/TB than 10TB Ultrastar air-filled drives
    - More Reliable
    25% higher MTBF rating than air-filled HDDs

    Continuous Innovation for Highest Capacities and Lower TCO

    The Ultrastar DC HC550 18TB CMR HDD and Ultrastar DC HC650 20TB SMR HDD are delivering industry leading capacity for the data center through a combination of new and proven technologies.

    Western Digital is the first to deliver Energy-Assisted Magnetic Recording (EAMR) technology and a Triple Stage Actuator (TSA). These new technologies combined with further mechanical innovations and HelioSeal technology provide the industry’s highest capacities to enable data at scale with optimized TCO for data center architectures, while maintaining workload reliability and performance.

    Mean time between failures (MTBF) 2500000 h
    Noise level (idle) 2 dB
    Workload rate limit 550 TB/year
    Start/stop cycles 600000
    24/7 operation Yes
    Average latency 4.16 ms
    HDD interface transfer rate 12 Gbit/s
    Storage drive buffer size 512 MB
    Component for Server/workstation
    Type HDD
    Interface SAS
    HDD speed 7200 RPM
    HDD capacity 18 TB
    HDD size 3.5"
    Operating voltage 5 / 12 V
    Power consumption (read) 6.5 W
    Power consumption (write) 6.5 W
    Power consumption (idle) 5.6 W
    Operational conditions
    Non-operating shock 250 G
    Operating shock 50 G
    Non-operating vibration 1.04 G
    Operating vibration 0.67 G
    Storage temperature (T-T) -40 - 70 °C
    Operating temperature (T-T) 5 - 60 °C
    Product Family Ultrastar
    Weight & dimensions
    Weight 690 g
    Height 26.1 mm
    Depth 147 mm
    Width 101.6 mm
    Packaging data
    Quantity 1
    Manual Yes
    Logistics data
    Harmonized System (HS) code 84717050

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