Ultrastar SATA Series SSD

Purpose-Built for Cloud, Boot and Edge


Optimized for Read-Intensive Workloads in the Cloud and at the Edge

Cloud and Software-defined Storage environments require elastic infrastructure to be able to adapt to continuously changing workload and data requirements. Delivering performance and capacity at the right time, while staying on budget, is essential to success. Western Digital’s Ultrastar DC SA620 SATA SSDs enable price/performance with mixed-use endurance options to support elasticity required for cloud data centers to succeed. SATA SSDs also play a role in edge computing, where applications like content delivery networks (CDNs) are moving away from centralized data centers to locations closer to those who are consuming the content. In such environments, data access speed is essential. SATA SSDs are key to delivering cost-effective performance for these read-intensive environments. Our purpose-built Ultrastar DC SA210 drives deliver price/performance to edge servers and read-intense CDNs, and are also well-suited for use as boot drives. With capacities as low as 120GB up to 1.92TB, you can choose the right capacity point for your operating system and logging requirements.


Delivering Edge and Cloud Economics

Purpose Built

Performance and endurance options deliver cost-efficiency to Cloud/Edge

Efficient Capacity

With models as low as 120GB, find a drive that fits your needs and budget

Enterprise Grade

All drives offer a 5-year limited warranty and 2M hr MTBF rating


  • Capacities as low as 120GB and up to 1.92TB
  • Up to 512 MiB/s read and 475 MiB/s write sequential throughput
  • Drop-in ready 6 Gb/s SATA interface works in existing infrastructure
  • Enterprise data durability features
  • Options for read-intense and mixed-use workloads
  • Enterprise-class 2M hour MTBF reliability rating

Applications and Workloads

  • IaaS, PaaS, and SaaS Infrastructure
  • Social Media, Web Servers
  • Software-Defined Storage (SDS)
  • eCommerce, Micropayments
  • Enterprise Server Boot
  • Video Streaming, Video-on-Demand
  • Audio Streaming and File Servers
  • Read-intensive applications that benefit from faster data access

Enterprise Solutions Made Affordable by SATA

Everywhere data lives, from sensors to mobile devices to the cloud, we’re driving the innovation necessary to stay ahead of new demands. Our breadth of expertise and level of integration gives us an unmatched ability to deliver carefully calibrated solutions for every type and use of data.


Ultrastar SATA Series
Product Portfolio

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Ultrastar DC SA620

Ultrastar DC SA210


Mid-Range Endurance

Models with 0.6 DW/D and 1.8 DW/D endurance rating (random workload) over a 5-year limited warranty

Efficient Capacity

Up to 1.92TB capacity based on 15nm MLC NAND, optimized for cloud and hyperscale environments

Throughput for Cloud & SDS

Up to 512 MiB/s sequential read and up to 56K IOPS mixed 70/30 R/W; write latency as low as 56μs



Ultrastar DC SA620



SATA 6 Gb/s

Form Factor

2.5-inch 7mm drive


1.8 DW/D: 1.6TB / 800GB / 400GB

0.6 DW/D: 1.92TB / 960GB / 480GB

Endurance (Drives writes per day, DW/D)2

1.8 DW/D: 1.8 for 5 years -or- 3 for 3 years

0.6 DW/D: 0.6 for 5 years -or- 1 for 3 years

Maximum Terabytes Written (TBW)

1.8 DW/D: 5,256 / 2,628 / 1,314

0.6 DW/D: 2,102 / 1,051 / 526

Flash Memory Technology



Sequential Read (max MiB/s, 128KiB)


Sequential Write (max MiB/s, 128KiB)


Random Read (max IOPS, 4KiB)


Random Write (max IOPS, 4KiB)

1.8 DW/D: 32,000

0.6 DW/D: 16,000

Mixed Random Read/Write (max IOPS 70%R/30%W, 4KiB)

1.8 DW/D: 52,000

0.6 DW/D: 28,000

Write Latency (μs, average)4

1.8 DW/D: 56

0.6 DW/D: 66


Unrecoverable Bit Error Rate (UBER)

1 in 1017

MTBF (M hours)5


Annualized Failure Rate (AFR)


Availability (hrs/day x days/week)


Limited Warranty

5 years


Requirement (DC, +/- 5%)


Operating (W, typical)

3.8 (write) / 2.6 (read)

Idle (W)


Physical Size

z-height (mm)


Dimensions (width x depth, mm)

69.85 x 100.2

Weight (g, max)



Operating Temperature7

0° to 70°C

Non-operating Temperature

-40° to 85°C

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One megabyte (MB) is equal to one million bytes, one gigabyte (GB) is equal to 1,000MB (one billion bytes), and one terabyte (TB) is equal to 1,000GB (one trillion bytes) when referring to storage capacity. Accessible capacity will vary from the stated capacity due to formatting, system software, and other factors.


Endurance rating based on DW/D using 4KiB random write workload over 5 years.


1MiB=1,048,576 bytes or 220, 1KiB= 1,024 bytes or 210


Average Write Latency at 4KiB QD=1.


MTBF and AFR targets are based on a sample population and are estimated by statistical measurement and acceleration algorithms under median operating conditions. MTBF and AFR rating do not predict an individual drive’s reliability and do not constitute a warranty.


The warranty for the product will expire on the earlier of (i) the date when the flash media has reached one-percent (1%) of its remaining life or (ii) the expiration of the time period associated with the Product.


Internal drive temperature as measured via the drive's temperature sensor.

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