Ultrastar DC HC600 SMR Series

Ultrastar DC HC600 SMR Series

Purpose-Built Efficiency for Sequential Write Workloads


Scaling Cloud and Hyperscale Capacity to New Levels with SMR Technology


As cloud and hyperscale data centers continue to look for affordable options to capture the growing volume and variety of data, Western Digital’s Ultrastar DC HC600 series of drives help address Big Data challenges with sequential write workloads. Optimized to deliver ununbeaten capacity and low Total Cost of Ownership (TCO), the Ultrastar DC HC600 series provides unprecedented capacity leadership by harnessing two core complementary technologies: HelioSeal technology and host-managed SMR (HM-SMR).

These field-proven technologies provide the foundation for delivering efficiency, quality, and reliable performance required by cloud and hyperscale data centers. Unlike CMR drives, HM-SMR drives are not drop-in replacements for traditional drives and require system software modifications that take advantage of the new command sets to ensure data is written sequentially to the drive. This software investment helps yield the most cost-efficient storage solutions.

Better TCO for Sequential-Write Applications

Massive Capacity

Up to 15TB capacity to capture, preserve, and access huge volumes of data



Host-managed SMR design supports sequential-write workloads

Extreme Efficiency

Our lowest power data center drive (Watts/TB)


  • Combines HelioSeal and host-managed SMR to deliver more cost-effective capacity than conventional magnetic recording (CMR) drives.
  • Purpose-built for “sequential write” applications and workloads
  • Consistent, predictable performance with uncompromising enterprise-class quality and reliability.
  • 2.5M hour MTBF rating.
  • 5-year limited warranty

Applications and Workload

  • Big Data or Bulk Storage
  • Cloud Storage
  • Social Media
  • Content Libraries, Streaming Media and Digital Media Assets
  • Online Back-up and Replication
  • Compliance, Audits, and Regulatory Records

Massive Capacity

Up to 15TB capacity, optimized for sequential-write applications

Predictable Performance

HelioSeal and host-managed SMR technology combine to deliver consistent, predictable performance


SMR technology boosts capacity but data must be written sequentially so system customization is required; Supports random reads


 Ultrastar DC HC620 
InterfaceSATA 6 Gb/sSAS 12 Gb/s
Capacity15TB / 14TB15TB / 14TB
Areal Density1108 / 10341108 / 1034
Format: Sector size (bytes)
4096, 4112, 4160, 4224
512, 520, 528
Data buffer (MB)512512
Rotational speed (RPM)72007200
Interface Transfer Rate(MB/s, max)600600
Sustained transfer rate
(MiB/s, typical)
(MB/s, typical)
244 / 223

255 / 233
244 / 223

255 / 233
Error rate (non-recoverable bits read)1 in 10^ 151 in 10^ 15
MTBF (M hours)2.52.5
Annualized Failure Rate (AFR)0.00350.0035
Load/Unload cycles (at 40°C)600000600000
Availability (hrs/day x days/wk)24x724x7
Limited warranty (yrs)55
Idle/Operating (Bels, typical)2.0/3.62.0/3.6
Requirement+5 VDC, +12VDC
Idle (W)5.26.2
Power consumption efficiency at Idle
0.35 / 0.37
0.00035 / 0.00037
0.41 / 0.44
0.00041 / 0.00044
Physical Size
z-height (mm)26.126.1
Dimensions (width x depth, mm)101.6 (+/-0.25) x 147101.6 (+/-0.25) x 147
Weight (g, max)660660
Environmental (Operating)
Ambient temperature5°C to 60°C5°C to 60°C
Shock (half-sine wave, 2ms, G)7070
Vibration-Operating (G RMS, 5 to 500 Hz)0.67 (XYZ)0.67 (XYZ)
Environmental (Non-Operating)
Ambient temperature-40°C to 70°C-40°C to 70°C
Shock (half-sine wave, G)300300
Random Vibration (G RMS, 2 to 200 Hz)1.04 (XYZ)1.04 (XYZ)