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18TB ULTRASTAR DC HC550 3.5 inch Enterprise SATA 7200RPM high performance with 512MB Cache

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In stock at supplier: Yes

Leaves our warehouse in approximately 1-2 weeks

Shipping cost is $9.90 (flat rate) for any size order.
This product is covered by an Australian Replacement Warranty.
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Product code: WDG0F38459

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Western Digital


18TB ULTRASTAR DC 3.5 inch SATA Enterprise 7200RPM 7200 RPM 512MB Cache.

Your price: $679.99

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Western Digital

18.0TB Ultrastar® DC HC550 
Hard Disk Drive

3.5-Inch | SATA 6.0Gb/s | 7200RPM | 512MB Cache
Ultrastar SATA Series: The New Gold Standard
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.
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.
  • 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
  • HelioSeal® design delivers outstanding power efficiency
  • 2.5M hours (projected) MTBF2 rating



Product Specifications

  • Capacity
    • 18.0 TB
  • Formatted Capacity
    • 16764 GiB
  • Form Factor
    • 3.5-inch
  • Storage Interface
    • SATA 6.0 Gb/s
  • Rotational Speed
    • 7,200RPM
  • Cache Data Buffer
    • 512 MB
  • Transfer Rate
    • up to 600.0Gb/s
  • Average Latency
    • 4.16 ms
  • Nonrecoverable Read Errors
    • 1 per 1015 bits read
  • MTBF (Mean Time Between Failures)
    • 2,500,000 hours
  • Annual Failure Rate
    • .35%
  • Contact Start Stops
    • 600,000
  • Idle Mode (Max)
    • Up to 5.6 Watts
  • Idle Mode, Low Power (Max)
    • Up to 0.31 Watts
  • Dimensions
    • Height: 2.6 cm (1.0 in)
    • Length: 14.7 cm (5.8 in)
    • Width: 10.2 cm (4.0 in)
  • Weight
    • 690.0 g (1.52 lbs)
  • Areal Density
    • 1,022Gb/in2
  • Ambient Temperature
    • Operating: 41°F to 140°F (5°C to 60°C)
    • Non-Operating: -40°F to 158°F (-40°C to 70°C)
  • Shock
    • Operating: 50 G max at 2 ms
    • Non-Operating: 250 G max at 2 ms
  • Idle (Typical)
    • 2.0 bels
  • Seek (Typical)
    • 3.6 bels

Additional Information

Capacity 18.0TB
RPM 7200
Type HDD
Interface SATA III (6Gb/s)
Form Factor 3.5 inch
Suitable for Mac Pro
Model Identifier No
Manufacturer Western Digital
Manufacturer P/N WDG0F38459
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Australian Owned Business 

Macfixit Australia is an Australian owned and operated business based in Melbourne, Victoria and we've been operating since 2005.

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Shipping cost is $9.90 (flat rate) for any size order. Express Options are available in cart/checkout. All in-stock orders are shipped the same day if received by 10.30 AM (Eastern Time Victoria). Orders received after 11:00 AM are shipped the following business day.

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