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Western Digital 0TS2533 Hard Drives Western Digital Ultrastar Dc Sn861 0ts2533 6.40 Tb Solid State Drive - 2.5" Internal - U.2 (pci Expr 619659211271

Part Number: 0TS2533
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Product Specifications



Western Digital Ultrastar DC SN861 0TS2533 6.40 TB Solid State Drive - 2.5" Internal - U.2 (PCI Express NVMe 5.0 x4) - Mixed Workload - Data Center Device Supported - 3 DWPD - 13700 MB/s Maximum Read Transfer Rate

6.4TB,NVME U.2 SFF-15MM RI-3 DW/D 28% OP, ISE, GENERIC

Manufacturer Part Number: 0TS2533



CPN:6.4TB,NVME U.2 SFF-15MM RI-3 DW/D 28% OP, ISE, GENERIC
MANUFACTURER NAME: Western Digital
MANUFACTURER PART NUMBER: 0TS2533
UPC EAN CODE: 619659211271
LANGUAGE: EN
MARKET:US

General Information:

Redefining the limits for high-performance storage

Be ready for the future of mission critical workloads with the Western Digital Ultrastar DC SN861. The latest Western Digital SSD with a cutting-edge PCIe®Gen5 enterprise-class speeds, the Ultrastar DC SN861 offers exceptional performance and multiple capacities up to 7.68TB1options. With high random read speeds and low power consumption, the DC SN861 is optimized for compute-intensive AI and machine learning applications, ensuring superior read/write performance, extremely low latency, and maximize IOPs/Watt. The DC SN861 also provides a rich feature set including NVMe™ 2.0 and OCP 2.0 support, 1 & 3 DWPD, and a 5-year limited warranty2, making it the ideal solution for hyperscale, cloud, and enterprise data centers.

Ready for the Demands of AI Workloads

Designed to handle compute-intensive AI and machine learning applications which require high bandwidths and low latencies.

Superior Performance and Capacity

Experience future-ready PCIe®Gen5 read/write speeds with capacities up to 7.68TB.

Designed for Power Efficiency

Architected to provide heightened performance per watt, optimizing power efficiency and reducing operational costs.

Outstanding Mixed Workload Performance

High-speed random reads provide enhanced solutions at low cost for your enterprise.

Optimized for Quality of Service (QoS)

Reduce latency during mission-critical workloads, delivering consistent Quality of Service (QoS) for your applications, even under heavy workloads.

Rich Enterprise Features

Benefit from enterprise-class features such as Power Loss Protection, End-to-End Data Path Protection, and TCG security and encryption, helping ensure data integrity and security

Future-Ready Data Infrastructure

Designed to support NVMe™ 2.0, and NVMe™ MI 1.2c, and OCP 2.0 supportive, for enhanced scalability and efficiency.

ManufacturerWestern Digital Corporation
Manufacturer Part Number0TS2533
Manufacturer Website Addresshttp://www.wdc.com
Brand NameWestern Digital
Product LineUltrastar
Product SeriesDC SN861
Product Model0TS2533
Product NameUltrastar DC SN861 NVMe SSD - 6.4TB, U.2
Product TypeSolid State Drive
  Product UPC619659211271
Technical Information:
Storage Capacity6.40 TB
Drive Performance:
Maximum Read Transfer Rate13700 MB/s
Maximum Write Transfer Rate7500 MB/s
Random 4KB Read3300000IOPS
Random 4KB Write800000IOPS
Endurance (DWPD)3
Endurance TypeMixed Workload
Mean Time Between Failures (MTBF)285.2 Year
Interfaces/Ports:
Drive InterfaceU.2
Drive Interface StandardPCI Express NVMe 5.0 x4
Physical Characteristics:
Drive TypeInternal
Form Factor2.5"
Miscellaneous:
Device SupportedData Center

What Can Your Device Hold?

Desktop HDD

1Photos based on a 10-Megapixel camera producing images 5MB in size
2Songs based on average length of 4 minutes, 4MB size
3HD video based on 720p or 1080i video
4Blu-ray HD Movie was calculated at 16.2Gb per hour recording rate

Date Inserted: Thursday January 30, 2025

This product was last updated on Friday April 24, 2026

All products are brand new and factory sealed unless otherwise stated.
 *** Disclaimer- Information is supplied by the Manufacturer. The image, including color, may differ from actual product appearance. CompSource, Inc. is not responsible for data. ***

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Two Day Air = $25.00
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This Product Has Limited Exchange Privileges.

Limited returns within 30 days of purchase permitted on this product.

For support on this product, please contact Western Digital. 714-932-5000 WWW.WESTERNDIGITAL.COM


Western Digital Company's Information

Western Digital  
Click Western Digital for all products

Local #: 714-932-5000

Toll Free #: 714-932-5000

Tech Support #: 800-832-4778

Site:  WWW.WESTERNDIGITAL.COM

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    About Western Digital

    Innovating at the Boundaries of Technology
    Whether in your pocket, home, car, or the cloud, its likely Western Digital is with you every step of the way. It's a responsibility we don't take lightly. That's why we are always at the cusp of innovation, pushing the boundaries of technology to make what you thought was once impossible, possible.

    Western Digital has long been at the forefront of game changing innovations. From the invention of the first hard drive to recent advancements in 3D NAND our journey of innovation continues to inspire those who dare to think big about the possibilities of data.

    Here are some of the most popular categories for Western Digital;





    Learn more about Hard Drives

    Everything You Want to Know About Hard Drives.

    Understanding hard drive basics will help you make better storage decisions.

    What's a Hard Drive Do?
    A hard drive is the hardware component that stores all of your digital content. Your documents, pictures, music, videos, programs, application preferences, and operating system represent digital content stored on a hard drive. Hard drives can be external or internal.

    Everything stored on a hard drive is measured in terms of its file size. Documents (text) are generally very small whereas pictures are large, music is even larger, and videos are by far the biggest. A hard drive determines the size of digital files in terms of megabytes (MB), gigabytes (GB), and terabytes (TB).

    There are 3 major versions of hard drive technologies. All of them have pros and cons and reasons for owning each versions;

    Standard Hard Drives

      This is an older technology but has continued to evolve in speed and reliability. Basically the technology is like a record player except the platters are metal instead of vinyl and the needle is magnetic allowing you to read, write and erase. The faster the hard drive spins, or RPM, the faster the read and write happens.
      Pros -- Cheapest per GB, very reliable and easily replaceable.
      Cons -- Much slower than newer technologies.

    Solid State or SSD Drives

      Solid State is basically a form of memory that can be written to and the data will stay saved even with the power off!
      Pros -- Very Fast read/write, no moving parts so it is quiet and in theory should last longer, less heat and energy.
      Cons -- Price per GB is more expensive than Standard HDD.

    M.2 Drives

      An M.2 SSD is a solid-state drive (SSD) that conforms to a computer industry specification written for internally mounted storage expansion cards of a small form factor. Shaped like a stick of gum. Most M.2 SSDs are 80 x 22mm (L x W), but they can be shorter or longer. You can tell what size an M.2 SSD is by reading the four or five-digit number in its name: the first two numbers are its width, while the others are its length (example: M.2 Type-2280).
      Pros -- Small for factor and SPEED,!!! M.2 card can use either the existing SATA 3.0 specifications and be restricted to the 600MB/s or it could instead elect to use PCI-Express that provides a bandwidth of 1GB/s under the current PCI-Express 3.0 standards.
      Cons -- Compatibility, since this is an internal storage device your motherboard must be newer and include the proper slot(s) to accommodate this storage technology.

    Hybrid Hard Drives

      A Hybrid Hard Drive may be the best of both worlds. In a Hybrid Drive you have both SSD and Platter or Standard Hard Drives included in one device. Typically you have a smaller SSD Drive coupled with a larger HDD. You have the low price per GB of an HDD and the speed of an SSD. This type of drive is a great choice for SMB workstations all the way to gaming machines.
      Pros -- Best overall value for the dollar as well as speed ratio.
      Cons -- Can add a level of complexity to some users as you basically have 2 drives in one and will have to be aware of what drive you will save data vs programs to.

    If you have an older Computer or notebook consider the SSD option as it will make your system feel new again with this faster storage technology.

    Internal vs. External or Portable Hard Drives

    External desktop hard drives are built using a drive and require an AC adapter plugged into a power outlet. These drives are a good choice for supplementing a desktop computer or plugging into a laptop's home base, and typically can extend your need to upgrade your hard drive or more importantly it can be used as a backup drive. As the saying goes "It's not if, but when something fails!" Please Backup...



    CompSource wants this to be as easy and stress-free as possible.

    We're here to help you decide. Chat with us or give our professionals a quick phone call (800)-413-7361, we can assist with the best solution for your needs and budget.



    I'm a very satisfied customer. I looked around online to find the best price on this product and you had it. I read the reviews on your site and figured I'd take a chance on it. The product was great and the free shipping was awesome. I received my speakers in 2 days (amazing for free shipping). I will purchase more products from you in the near future. Earl in NY bugy
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