Skip to content

Western Digital Ultrastar DC HC550 WUH721818ALE6L4 0F38459 18TB 7.2K RPM SATA 6Gb/s 512e 512MB 3.5" SE Manufacturer Recertified HDD

View all Ultrastar SATA drives in stock

Sold out
Availability: Out of stock
Sold out

Notify me when back in stock


Form Factor3.5"
Spindle Speed7.2K RPM
ConditionManufacturer Recertified
Warranty2 Years Seller

Shopper Approved Logo

Western Digital Ultrastar DC HC550 18 TB SATA Hard Drives

Ultrastar HC550 Recert DriveOverview

  • 18TB high capacity internal hard disk drive
  • Up to 262 MB/s (megabytes per second) under optimal conditions.
  • High-endurance drives designed for 24x7 continuous use
  • 512 MB Cache
  • Uses conventional magnetic recording (CMR) to deliver consistent and predictable performance across a wide range of workloads.
  • Helium sealed drive design delivers lower total cost of ownership through lower power and weight
  • Designed specifically for hyperscale environments requiring high data transfer rates and minimal latency.
  • 2,500,000 Hour Mean Time Between Failures (MTBF)


  • Maximize total cost of ownership savings through lower power and weight with HelioSeal helium sealed-drive design 
  • Harnesses Energy-Assisted Magnetic Recording (EAMR) technology to improve writability and therefore increases areal density. 
  • Triple Stage Actuator design
  • Hot Plug Support for easy replacement of failed drives without system downtime.
  • Drop-in ready for enterprise applications such as, cloud and hyperscale storage, massive scale-out data centers, big data machine learning, surveillance analytics


  • Compatible with Network Attached Storage (NAS) systems including Synology and QNAP 
  • Personal desktop computers for users who require high performance and endurance
  • Cloud and Hyperscale Storage
  • Surveillance analytics
  • Content Delivery Networks (CDNs)
Type Enterprise - Server / Workstation HDD
Brand Western Digital
Series Ultrastar DC HC550
Model Number WUH721818ALE6L4
Part Number 0F38459
Form Factor 3.5"
Capacity 18TB
Interface SATA 6Gb/s
Spindle Speed 7.2K RPM
Tray Tray not included
Weight 1.7 lbs
Width 4 in
Height 1 in
Depth 5.8 in
Click to view WUH721818ALE6L4 datasheet
Condition - Manufacturer Recertified : 2 Year Limited Period Warranty
Satisfaction Guarantee: Return for refund within 30 days of package reception date.
This item is covered by Return Policy
To initiate a return please fill out the Return Form
For frequently asked questions about warranties and returns please visit our FAQs
Our drives ship in 225lb per sq inch pressure-rated boxes, specifically tested for impact. Inside the box you’ll find suspension brackets, foam inserts, or air filled pockets that secure the drive in place and prevent any possible impact from movement in the shipping process. The drive itself is sealed in an anti-static bag that protects the drive from any electromagnetic interference.
Some references may appear on this website or product descriptions to trademarks belonging to others not affiliated with (SPD), including references which may not display the ® symbol. All third-party trademarks (including logos and icons) referenced by SPD remain the property of their respective owners. Unless specifically identified as such, SPD’s use of third-party trademarks does not indicate any relationship, sponsorship, or endorsement between SPD and the owners of these trademarks. Any references by SPD to third party trademarks is to identify the corresponding third-party goods and/or services and shall be considered nominative fair use under trademark law.

Questions & Answers

Have a Question?

Be the first to ask a question about this.

Ask a Question