Western Digital Ultrastar DC HC550 3.5" 18000 GB SAS (0F38352)

Mfg. SKU: 0F38352

SKU: 1035425

HDD size
3.5 "
HDD capacity
18000 GB
HDD speed
7200 RPM
AED 1,565.62 AED 1,491.07
Availability: 2 pcs.

Western Digital Ultrastar DC HC550 3.5" 18000 GB SAS

Western Digital Ultrastar

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.

Western Digital Ultrastar DC HC550 3.5

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.

Western Digital Ultrastar DC HC550 3.5
Western Digital Ultrastar DC HC550 3.5

Additional Product Notes

  1. 18/16TB capacity¹ in a standard 3.5-inch form factor
  2. CMR technology works with all capacity enterprise applications & environments
  3. Reliable, field-proven, 6th generation design
  4. Industry’s first HDD with Energy-Assisted Magnetic Recording technology
  5. Industry’s first Triple Stage Actuator
  6. HelioSeal® design delivers outstanding power efficiency
  7. 2.5M hours (projected) MTBF² rating & 5-year limited warranty
  8. Self-Encrypting Drive Options
Interface transfer rate (MB/s, max) HDD capacity HDD speed Interface
1200 Gbit/s 18/16TB 7200 RPM SAS 12Gb/s
HDD size
3.5 "
HDD capacity
18000 GB
HDD speed
7200 RPM
Component for
Storage drive buffer size
512 MB
HDD interface transfer rate
12 Gbit/s
Average latency
4.16 ms
24/7 operation
Start/stop cycles
Workload rate limit
550 TB/year
Noise level (idle)
2 dB
Mean time between failures (MTBF)
2500000 h
Weight & dimensions
101.6 mm
26.1 mm
147 mm
690 g
Packaging data
Power consumption (read)
6.5 W
Power consumption (write)
6.5 W
Power consumption (idle)
5.6 W
Operating voltage
5 / 12 V
Operational conditions
Operating temperature (T-T)
5 - 60 °C
Storage temperature (T-T)
-40 - 70 °C
Operating vibration
0.67 G
Non-operating vibration
1.04 G
Operating shock
50 G
Non-operating shock
250 G