Dell VF206 / Western Digital WUH721816AL5200 16TB 3.5" SAS 12Gbps Hard Drive

Western Digital Part #/MPN: WUH721816AL5200

DiscTech Item #: WDC-WUH721816AL5200-BN-OE-DEL

  • Low Stock:Call for ETA
    Stock Levels

    This item is currently (nearly) out of stock. It may be possible to arrange fast shipment. If you need it urgently call us. Otherwise, it usually ships within 1 week.


Enterprise Grade

Capacity: 16TB

Speed: 7,200RPM

Interface Types: SAS Serial Attached SCSI

Form Factor: 3.5inx1.0in LFF Hard Drive

Sector Size: 512 / 512e

Sustained Throughput: 243/255

Average Seek Time: 8.0/8.6

Electrical Interface: SAS-3 Serial Attached SCSI v3 - 12.0Gbps

On-Board Cache: 256MB

Dell VF206 / 0VF206 / Western Digital UltraStar DC HC550 WUH721816AL5200 16TB 3.5" 12Gbps 7.2K RPM 512e SAS HDD - Brand New OEM

Dell VF206 / 0VF206 / Western Digital UltraStar DC HC550 WUH721816AL5200 16TB / 16000GB 3.5" 12Gbps 7.2K RPM 512e SAS HDD / Hard Disk Drive with Instant Secure Erasure - Brand New

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 Hel

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


• 18/16TB capacity¹ 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) MTBF² rating & 5-year limited warranty 

• Self-Encrypting Drive Options 



• 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



This drive is compatible with any server that accepts 3.5inx1.0in Large Capacity 12Gb/s SAS Drives.

Ultrastar He8
Model/Part No.WUH721816AL5200
Alt Model/Part No.VF206
InterfaceSAS 12Gb/s
Format : Sector size (bytes)512e: 512
Max. Areal density (Gbits/sq. in)918
Data buffer (MB)512
Rotational speed (RPM)7200
Latency average (ms)4.16
Interface transfer rate (MB/s, max)1200
Sustained transfer rate (MB/s, typ.)
(MiB/s, typical)

WorkloadsUp to 550 TB / year
Error rate (non-recoverable, bits read)1 in 10E15
Load/Unload cycles (at 40°C)600,000
Availability (hrs/day x days/wk)24x7
MTBF (M hours)2.5
Annualized Failure Rate (AFR)0.35%
Idle (Bels, typical)2.0/3.6
Requirement+5 VDC
+12 VDC
Idle (W)5.8
Power consumption efficiency at idle (W/TB)

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 temperature5°C to 60°C
Shock (half-sine wave, 2 ms, G)50
Vibration (G RMS 5 to 500 Hz)0.67 (XYZ)
Environmental (Non-Operating)
Ambient temperature-40°C to 70°C
Shock (half-sine wave, G)250 (2ms)
Random Vibration (G RMS 2 to 200 Hz)1.04 (XYZ)

Click here to view the manufacturer's item description/brochure

ROHS Compliant

Alternate MPNs: VF206 0VF206

Weight: 1.8 lb

Warranty: 1 Year DiscTech

Brand New

Condition Levels Explained

The product is brand new.

1 Year DiscTech Warranty

Product Warranties Explained

The product has a DiscTech warranty for the time period specified. View our limited warranty