Western Digital | ASA Computers

Ultrastar SAS Series

Scalability for Servers and Storage with Proven, Trusted Design


Generations of Proven Designs Provide Reliable, Secure Data Center Scalability

As data centers and enterprises struggle to manage the growing abundance and availability of data, Western Digital delivers a portfolio of dual-port 12 Gb/s Serial Attached SCSI (SAS) SSDs with capacity, performance and endurance options to help address the challenges of data access. Ultrastar DC SS530, our newest SAS SSD, delivers up to 15.36TB, double the capacity of prior generations. Our Ultrastar SAS series includes three endurance options to meet the requirements of a full range of applications and workloads. Data security features include self-encrypting drives based on TCG enterprise standards and FIPS validation. Ultrastar SAS drives are trusted by major OEMs and leverage decades of proven enterprise storage expertise in firmware development, design, and reliability. Ultrastar builds on its strong tradition of leading-edge SAS SSD products to deliver more capacity and better performance, combined with a continued emphasis on reliability to create global scalable, high-availability servers, and storage systems where data can thrive.

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Scale with Confidence

Trusted Interface

Dual port 12 Gb/s SAS helps ensure reliable, fast access to data

Proven Reliability

Trusted in data centers worldwide, with unbeaten 2.5M hr MTBF

Security Options

Protect data with FIPS-validated, self-encrypting TCG models

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  • Capacities from 400GB to 15.36TB
  • Reliable, proven dual port 12 Gb/s SAS interface supports high-availability storage environments
  • 3D MLC or TLC NAND Flash delivers performance and endurance
  • Three endurance options support range of data center workloads
  • Enterprise-class 2.5M hour MTBF reliability rating

Applications and Workload

  • Enterprise-class servers and high performance computing
  • Online Transaction Processing (OLTP)
  • Financial Transaction Systems
  • File Servers
  • Database Analytics.
  • Space and/or power-constrained environments

Maximum Capacity

Our newest SAS SSD delivers up to 15.36TB capacity, double the capacity of prior generations

Superior Performance

Delivers up to 440K random read and 320K random write IOPS

Range of Endurance

Three endurance options support a full range of data center applications and workloads

Ultrastar DC SS530
SAS 12 Gb/s
Form Factor
SFF 2.5-inch drive
10 DW/D: 3.2TB / 1.6TB / 800GB / 400GB
3 DW/D: 6.4TB / 3.2TB / 1.6TB / 800GB / 400GB
1 DW/D: 15.36TB / 7.68TB / 3.84TB / 1.92TB / 960GB / 480GB
Endurance (Drives writes per day, DW/D)2
Maximum Terabytes Written (TBW)
10 DW/D: 59,690 / 29,410 / 15,220 / 7,630
3 DW/D: 36,170 / 17,520 / 9,410 / 4,700 / 2,350
1 DW/D: 30,110 / 15,050 / 6,790 / 3,760 / 1,880 / 940
Flash Memory Technology
Sequential Write (max MiB/s, 128KiB)
Random Read (max IOPS, 4KiB)
Random Write (max IOPS, 4KiB)
10 DW/D: 320,000
3 DW/D: 240,000
1 DW/D: 100,000
Mixed Random Read/Write (max IOPS 70%R/30%W, 4KiB)
10 DW/D: 430,000
3 DW/D: 330,000
1 DW/D: 190,000
Read/Write Latency (µs, max)4
10 DW/D: 92/26
3 DW/D: 92/27
1 DW/D: 92/36
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
+5 VDC, +12 VDC
Operating (W, typical)
9, 11, 14
Idle (W, average)
Physical Size
Z-Height (mm)
Dimensions (width x depth, mm)
70.1 x 100.45
Weight (g, max)
Operating Temperature7
0° to 70°C
Non-operating Temperature
-40° to 85°C