Western Digital
| File:Western Digital logo.svg Logo used since 2004, highlighting "WD" initials | |
| Company type | Public |
|---|---|
| Industry | Data storage |
| Founded | April 23, 1970 in Newport Beach, California, United States |
| Founder | Alvin B. Phillips |
| Headquarters | San Jose , United States |
Area served | Worldwide |
Key people | Chuck Missler (Chairman and CEO from 1977) |
| Products | Hard disk drives (HDDs), solid-state drives (SSDs), external storage devices |
Number of employees | 13,000 (1994, Malaysia plant) |
| Website | www |
Western Digital Corporation is a prominent American company specializing in data storage solutions, with its headquarters located in San Jose, California. Established in 1970 by Alvin B. Phillips, the company stands as one of the leading global producers of hard disk drives (HDDs).
1970s
On April 23, 1970, Alvin B. Phillips, then an employee at Motorola, founded the company initially named General Digital Corporation, which began by manufacturing MOS testing equipment. The original base was in Newport Beach, California, but the company soon relocated to Santa Ana, California, becoming one of the largest technology enterprises headquartered in Orange County, California. Early funding came from private investors and industrial giant Emerson Electric. Around July 1971, the firm rebranded as Western Digital and introduced its inaugural product, the WD1402A UART.
During the early 1970s, Western Digital concentrated on producing calculator chips and had become the world’s largest independent manufacturer of such chips by 1975. However, financial difficulties arose following the mid-1970s oil crisis and the bankruptcy of a major client, Bowmar Instrument, leading to Western Digital filing for Chapter 11 bankruptcy protection in 1976. Subsequently, Emerson Electric ceased its support, and Chuck Missler assumed the roles of chairman and CEO in June 1977 while becoming the company’s largest shareholder.
In 1973, Western Digital established a semiconductor fabrication facility in Malaysia to bolster its international operations.
Product development in the late 1970s included the MCP-1600 multi-chip microcoded CPU utilized in DEC's LSI-11 systems and Western Digital's own Pascal MicroEngine microcomputer running the UCSD p-System. A significant driver of growth was the FD1771, among the earliest single-chip floppy disk drive formatter/controllers that replaced complex TTL logic arrays. This innovation strengthened Western Digital’s position in storage technology markets.
1980s
Western Digital’s venture into data storage technology began with the FD1771 and progressed to manufacturing hard disk drive controllers by the early 1980s. In 1983, they secured a contract to provide IBM with controllers for its PC/AT computers. The WD1003 controller they developed became foundational to the ATA interface standard, created in collaboration with Compaq and Control Data Corporation’s MPI division starting in 1986. This product line significantly contributed to Western Digital's revenue growth throughout that decade.
Throughout the mid-to-late 1980s, profits generated from ATA controllers enabled Western Digital to diversify as a general OEM hardware supplier. The company expanded through acquisitions including Paradise Systems (graphics cards, 1986), Faraday Electronics (core logic chipsets, 1987), and ADSI (SCSI controller chips, 1986). Although storage-related integrated circuits remained their main income source, subsidiaries such as Paradise produced competitive VGA graphics cards. Notable innovations during this period included the WD33C93 single-chip SCSI interface (1986), WD37C65 floppy disk controller chip (1987), and WD42C22 "Vanilla" single-chip ATA hard disk controller (1988).
A major strategic development occurred in 1988 when Western Digital purchased Tandon Corporation's hard drive manufacturing assets and launched their own "Centaur" series of ATA and XT attachment drives under the Western Digital brand.
1990s
By 1991, the transition from ST-506 and ESDI drives to ATA and SCSI standards caused a decline in demand for hard disk controller boards. Western Digital countered this trend by launching its Caviar series, which incorporated embedded servo mechanisms and advanced diagnostic software, initially boosting sales significantly.
Despite early success, Western Digital began shedding non-essential business units: Paradise was divested to Philips; networking and floppy disk controller operations were transferred to SMC Networks; and the SCSI chip segment was sold to Future Domain, which was later acquired by Adaptec. By 1995, technological advancements by competitors such as Quantum Corp. had surpassed Western Digital’s offerings, resulting in a reduction of its market presence.
In 1994, Western Digital expanded its manufacturing footprint by opening a plant in Malaysia staffed with 13,000 employees. Innovative products like the Portfolio, a compact 3-inch drive, and the SDX interface bridging hard disks with CD-ROMs did not achieve commercial success. Furthermore, quality concerns led system integrators and enthusiasts to prefer rival brands like Maxtor.
In an effort to reverse its fortunes in 1998, Western Digital formed a strategic alliance with IBM to gain access to technologies such as giant magneto-resistive (GMR) heads and IBM’s manufacturing capabilities. This partnership yielded the Expert series in 1999, which helped regain industry credibility despite a recall in 2000 caused by motor driver chip faults. Eventually, Western Digital concluded its collaboration with IBM.
2000s
In 2001, Western Digital became the first to introduce mainstream ATA hard drives equipped with an 8 MiB disk buffer, doubling the prevailing 2 MB standard. The initial product was the 100 GB WD1000JB model, followed by smaller capacity variants. These "Special Edition" JB drives were aimed at cost-conscious file server users. In October of that year, the company restated its previous fiscal results due to accounting adjustments and reclassified Connex and SANavigator as discontinued operations.
Western Digital enhanced its magnetic head technology in 2003 by acquiring key assets from the bankrupt Read-Rite Corporation for $95 million. That same year saw the release of the WD360GD "Raptor", marking the first 10,000 rpm Serial ATA HDD with a capacity of 36 GB and an access time below six milliseconds. The quieter WD740GD model followed with 74 GB capacity. In 2004, the company refreshed its logo to highlight the "WD" initials.
By 2005, the Raptor series expanded with a 150 GB model (WD1500ADFD) and a distinctive transparent-window edition known as Raptor X. The lineup peaked at 160 GB (WD1600ADFD). These drives carried five-year warranties, targeting storage server markets where reliability is paramount.
In 2006, Western Digital introduced the My Book external hard drive family featuring compact designs; by 2007, this lineup included models offering up to 1 TB of storage.
The acquisition of magnetic media manufacturer Komag in 2007 enabled Western Digital to implement perpendicular recording technology across both notebook and desktop drives, facilitating increased storage capacities. Additionally, the company launched energy-saving GP (Green Power) drives designed to lower power usage via head unloading during idle times. Nevertheless, these models attracted criticism due to aggressive head parking that negatively affected Linux systems’ lifespan.
On April 21, 2008, Western Digital revealed the WD VelociRaptor, an upgraded SATA drive spinning at 10,000 rpm with a capacity of 300 GB. This model employed platters mounted within an IcePack frame equipped with a heat sink and delivered performance gains approximately 35% faster than previous versions. Later that year, it introduced a 500 GB Scorpio Blue drive for notebooks.
On January 27, 2009, Western Digital launched the industry’s first internal hard disk drive with a 2 TB capacity. In March of that year, it entered the solid-state drive market through acquisition of SiliconSystems Inc., although this initiative was eventually discontinued; nonetheless, its technology contributed to later SSD advancements culminating in the strategic purchase of SanDisk in 2016.
By mid-2009, Western Digital had released the first mobile hard drives offering 1 TB capacity in both Passport portable USB and Scorpio Blue notebook formats. In October, it announced shipment of its inaugural 3 TB internal HDD featuring SATA connectivity and advanced platter density of 750 GB per platter.
2010s
In March 2011, Western Digital completed the acquisition of a segment of Hitachi's storage division, HGST, for approximately $4.3 billion—comprising $3.5 billion in cash and the remainder through 25 million shares of Western Digital stock.
That same year, Western Digital allocated $1.2 billion to develop a research and development center at its manufacturing site in Malaysia.
By March 2012, the HGST acquisition was finalized, positioning Western Digital as the world’s leading traditional hard drive manufacturer. To satisfy regulatory conditions, the company sold specific 3.5-inch hard drive assets to Toshiba, receiving in return a 2.5-inch drive factory located in Thailand.
In December 2013, Western Digital discontinued production of parallel ATA (PATA) hard drives for both laptops and desktops, effectively ending PATA manufacturing within the industry.
February 2014 introduced the "Purple" series of HDDs designed specifically for video surveillance systems, offering storage capacities from 1 to 4 TB and incorporating technologies aimed at minimizing write errors.
In October 2015, China’s Ministry of Commerce approved the integration of HGST into Western Digital’s main operations under stipulations that maintained the HGST brand and sales team for two years. The HGST brand was completely phased out by 2018.
Western Digital expanded its portfolio in May 2016 by acquiring SanDisk for $19 billion, strengthening its position in flash memory markets. During summer 2017, it licensed Fusion-io/SanDisk ION Accelerator software to One Stop Systems.
As part of operational streamlining, HGST’s Malaysian plant was shut down in 2016.
April 2017 saw Western Digital move its corporate headquarters from Irvine to San Jose, California—the former base of HGST—aligning organizational structure following the acquisition.
In August 2017, Western Digital enhanced its cloud service capabilities by acquiring Upthere, a cloud storage provider.
September 2017 marked the purchase of Tegile Systems, a manufacturer specializing in flash storage arrays; Tegile was rebranded as IntelliFlash before being sold to DataDirect Networks in September 2019.
October 2017 featured the launch of the HGST Ultrastar Hs14—the first helium-filled hard drive with a capacity of 14 TB—demonstrating technological advancement.
In December 2017, Western Digital reached a settlement with Toshiba concerning their jointly owned NAND flash production facility in Japan.
June 2018 brought the acquisition of Wearable, Inc., creators of SanDisk Wireless Drive products built on Wearable’s AirStash platform.
By July 2018, Western Digital announced plans to close its Kuala Lumpur hard disk manufacturing plant to concentrate on flash drive production while maintaining two HDD factories in Thailand. That year, the company was ranked 158th on the Fortune 500 list based on revenue.
A significant power outage occurred in June 2019 at Kioxia’s Yokkaichi facility—used by Western Digital for flash memory fabrication—resulting in an estimated loss of six to fifteen exabytes of NAND chips and disrupting global supply chains.
2020s
In November 2020, Western Digital introduced the WD Black SN850 1TB consumer SSD equipped with an exclusive NVMe 1.4 controller ("G2"). This SSD outperformed Samsung’s 980 Pro 1TB and other models utilizing Phison E18 controllers. The only SSD surpassing it was Intel’s Optane series, designed for high-end workstations and servers but priced at over five times the cost.
By June 2021, users of discontinued My Book Live NAS devices (last produced in 2013) reported unexpected data deletions; Western Digital recommended disconnecting these units from internet access as a precaution.
In August 2021, merger discussions began between Western Digital and Japanese memory-chip manufacturer Kioxia (formerly Toshiba Memory), targeting a transaction exceeding $20 billion; however, negotiations stalled by October.
Contamination problems at joint flash memory production plants in Japan caused output suspensions by February 2022, impacting at least 6.5 exabytes of memory production.
On March 23, 2023, Western Digital experienced a cyberattack that compromised internal systems. This breach forced temporary shutdowns of services including My Cloud; attackers demanded an eight-figure ransom after extracting roughly 10 TB of data.
Merger talks with Kioxia resumed mid-2023 but were ultimately abandoned in October due to opposition from Kioxia’s largest shareholder Bain Capital and indirect stakeholder SK Hynix.
On February 24, 2025, Western Digital spun off its flash memory division as Sandisk Corporation, refocusing exclusively on hard disk drives. This move reversed the earlier SanDisk acquisition and transferred all flash storage product lines formerly under Western Digital to Sandisk.
Products
Western Digital offers a diverse range of storage solutions including hard drives designed for personal computers, video game systems, security surveillance setups, network-attached storage (NAS) devices, and set-top boxes. Additionally, the company provides enterprise-grade datacenter hardware and software, notably the Ultrastar series, which originated from the HGST brand.
The company categorizes its storage devices using color-coded branding to signify their intended applications:
| Color/branding | Application | HDD warranty duration (years) | |
|---|---|---|---|
| WD Blue | Everyday computing | 2 | |
| WD Purple | Video surveillance | 3 | |
| WD Purple Pro | Surveillance systems | 5 | |
| WD Red | Small office/home office environments | 3 | |
| WD Red Plus | Small business, NAS, RAID configurations | 3 | |
| WD Red Pro | High-performance NAS applications | 5 | |
| WD_Black | Gaming and high-performance use cases | 5 | |
| WD Gold | Enterprise-grade storage | 5 | |
| Ultrastar | Datacenter operations | 5 | |
WD Purple drives are engineered specifically for write-intensive tasks common in security camera systems. They incorporate AllFrame technology to minimize video frame loss and support ATA streaming commands to ensure smooth data flow.
For external storage, Western Digital markets products under brands such as My Passport, My Book, WD Elements, and Easystore. Despite this range, some of WD’s encrypted external drives have been criticized due to vulnerabilities impacting data security.
In the media player segment, Western Digital previously offered the WD TV lineup from 2008 until 2016, serving as home theater PC alternatives. Currently, the My Cloud series provides home media servers running OS 3, which facilitates seamless synchronization across multiple devices.
After acquiring Upthere, Western Digital expanded its portfolio to include personal cloud storage solutions with the Upthere Home application and the UpOS operating system.
On February 24, 2025, Western Digital separated its flash memory division into an independent company named Sandisk Corporation. This move reversed the earlier acquisition of SanDisk but allowed WD to maintain flash storage products that had been marketed under its own brand.
Legacy product lines
Discontinued Western Digital product families include:
- Tidbit
- Caviar
- Expert
- Raptor – High-speed hard drives spinning at 10,000 RPM.
- VelociRaptor – A compact 2.5-inch variant of the Raptor series.
- S25 (later renamed XE) – SAS interface version of VelociRaptor.
- Scorpio
- WD Green – Energy-saving HDDs with variable rotational speeds ranging from 5400 to 7200 RPM; HDD production ceased in 2015 with features integrated into the Blue lineup. The Green label continues to be used for SSD products.
Former products
Western Digital briefly ventured into wireless router manufacturing but withdrew from the networking sector by early 2014.
Corporate affairs
Western Digital Capital serves as the company’s investment division, backing ventures in data technology such as Elastifile and Avere Systems. This investment strategy fosters innovation and supports Western Digital’s expansion within the storage industry.
Litigation
Western Digital has encountered legal challenges concerning the advertised storage capacity of its hard drives, which are marked using the decimal measurement system (1,000 bytes per kilobyte) instead of the binary system (1,024 bytes per kilobyte) employed by most operating systems. This difference resulted in users perceiving a shortfall in available capacity. The company asserted that its labeling complied with industry norms but resolved the matter in 2006 by providing affected customers with $30 worth of backup and recovery software.
In May 2020, Western Digital faced a lawsuit alleging failure to inform consumers about the use of shingled magnetic recording (SMR) technology in its WD Red NAS drives. The complaint claimed that SMR technology is not appropriate for RAID configurations, a primary use case for these drives. Rival manufacturer Seagate highlighted that it exclusively uses conventional magnetic recording (CMR) for its NAS products due to SMR's drawbacks. Western Digital responded by launching the "Red Plus" series featuring CMR drives, while reserving the "WD Red" line, which employs SMR, for light-duty small office/home office environments.
Corporate Acquisitions
| Acquisition Date | Company | Product Categories | Acquisition Cost |
|---|---|---|---|
| July 2003 | Read-Rite Corporation | Magnetic Head Assemblies (HGA, HSA) | $95.4 million |
| June 29, 2007 | Komag | Hard disk media | $1 billion |
| March 8, 2012 | HGST | Hard disk drives, solid-state drives | $3.9 billion |
| January 22, 2013 | Arkeia Software | Backup software solutions | — |
| September 12, 2013 | sTec, Inc. | Solid-state drives | $340 million |
| October 17, 2013 | Virident Systems | Solid-state drives, systems and software | $685 million |
| December 15, 2014 | Skyera | Flash storage arrays | — |
| March 16, 2015 | Amplidata | Software development | — |
| May 12, 2016 | SanDisk | Solid-state drives, systems and software, NAND flash memory, embedded solutions | $19 billion |
| August 28, 2017 | Upthere | Flash storage, persistent storage, cloud services | — |
| September 2017 | Tegile Systems | Flash storage, persistent storage, cloud services | — |
| September 2019 | Kazan Networks | Flash storage technologies |