wd hard disk

Western Digital Hard disks

The Western Digital hard disk (WD) is a hard disk manufactured by Western Digital Corporation. Western Digital Corp is the world's leading hard disk manufacturer. The company was founded in 1970 and began designing and producing hard disks in 1988. Headquartered in Lake Forest, California, USA, it is one of the oldest hard disk manufacturers and one of the founders of IDE interfaces. WD employs approximately 23,000 people worldwide.

Western digital company

The company has manufacturing facilities in Malaysia, California, and Thailand, design facilities in southern and northern California, and operations worldwide. After exiting the SCSI market in 1999, WD focused on the IDE segment, with sales of $1.015 billion in the second half of 2001 and a profit of $33 million. WD company is not good at publicity company, let people can remember the unique technology is few, in fact, WD's technical strength is not to be underestimated, its hard disk performance at a high level for a long time must have advanced technology support. Western Digital has long been committed to providing complete storage solutions for personal computer users around the world, and Western Digital has rich experience in serving users and organizations that collect, manage and use digital information. Western Digital's product line covers enterprise servers, desktop IDE hard disks, mobile storage applications and AV.

Hard disk brand

WD Raptor and WD Caviar Caviar are registered trademarks. WD Passport, WD Scorpio and WD Logo are Western Digital Technologies, Inc. The trademark of... All other brand and product names mentioned herein are the property of their respective companies.

Product classification

enterprise-class

【WD Raptor 】 SCSI interface for advanced workstation and server markets. It offers an average of 1.2 million hours of trouble-free time and a 5-year warranty.

Desktop level

(Desktop hard disk) : [WD Raptor X] 10 thousand RPM hard disk with SATA interface 150 GB, 1.5 Gb/s, 16 MB cache, 10,000 RPM. Five years warranty. Caviar(Caviar) series [WD Caviar SE16] run fast and quiet, low heat, with 16 MB cache, support NCQ, support hot swap, support 3G/s transmission rate, in line with REV.2.5 specifications. 【 WD Caviar GP】 (Green power) hard disks make desktop PCS and external storage devices run quieter and generate less heat. This device can save important power resources. 【WD Caviar SE】 The hard disk runs quietly, fast, low heat, equipped with 8MB cache, showing superior performance and reliability SATA interface to 2TB GB, 3Gb/SEC, 8MB cache, 7200 RPM. 【 WD Caviar 】 The Western Digital Caviar hard disk is the best choice for mainstream desktop personal computers with a maximum capacity of 2TBG.

Portable hard disk

WD Scorpio drives are characterized by high performance and low power consumption. The 5 400 RPM WD Scorpio is extremely fast but consumes very little power, extending system battery life and increasing long-term reliability. WD entered the mobile hard disk market in 2005.

Digital video

WD AV series drives are widely used in security audio products, including set-top boxes, DVD players and mainstream surveillance system equipment. Capacities range from 80GB to 720GB using EIDE and SATA interfaces.

Color classification

Blue represents mainstream hard disk products. The sense of stability conferred by BLUE represents the professionalism and reliability of Western Digital Blue. Caviar Blue(Western number Caviar) and Scorpio Blue(Scorpion to special) are the most commonly used series of 3.5-inch and 2.5-inch products, respectively. This series of hard disks can meet the harsh requirements of ordinary users for hard disk stability.
Blue disk 7200 RPM, all aspects are more balanced, the performance measured down and the black disk is similar, do system disk and store the game is good. 3 years guarantee. Common models are: WD1600AAJS, WD5000AAKS, WD10EALS, WD10EALX, WD3200BEVT, etc.
Green represents environmentally friendly hard disk products. Green represents the energy saving and environmental protection hard disk in the 3.5-inch WD Caviar series with its fresh and environmental protection meaning. WD Green Drives with WD GreenPower technology provide a quieter, environmentally friendly and low-power storage solution for energy-conscious consumers.
Green disk 5400 RPM, low noise and energy saving, the disadvantage is poor performance. It is suitable for making warehouse inventory of movies and materials. 3 years guarantee. Common models are: WD5000AADS, WD10EADS, WD10EADX, WD10EARS, WD10EVDS, etc.
Black represents the highest performance product. Black gives Western Digital hard disk the ultimate performance because of its professional top-level implication and speed sense. The rock-solid mechanical structure provides the perfect storage solution for professional enthusiasts and those looking for extreme performance.
Black disk 7200 RPM, the cache can be used to download disks and system disks, often read and write program files. 5 years guarantee. Common models: WD5001AALS, WD1001FALS, WD1002FAEX, WD2001FASS, WD3200BEKT, etc.
Red disk: The red disk is located in the home, small office NAS, with the ability to work 7×24. The power consumption and noise are comparable to the green disk, but the reliability and stability are far better than the green disk.
The latest release of purple disk: Purple disk is specifically for video surveillance applications, after a special monitoring compatibility test (including CCT certification), can 24×7 uninterrupted operation, the average time between failures of 1 million hours, suitable for home, SOHO, small and medium-sized enterprises. It supports up to eight hard disks in parallel, supports access to up to 32 high-definition cameras, annual write load of 60TB, and typical power consumption of 5.1W.

Hard disk number

Western Digital's IDE drives include the Caviar (Caviar) and Experl (Expert) series, though the latter has long since been discontinued. WD hard disks are basically divided into three categories: high-end BB series, mid-end AB series, low-end EB series, of which only BB series hard disks are 7200 RPM products. The number of Western digital hard disks usually consists of a main number and an additional number, but Western Digital does not disclose the specific meaning of the additional number to the retail market.
The numbering format of Western Digital varies according to the product series, and the numbering method is simple and clear, consisting of 12 numbers or letters. In the 12 numbers, the first 6 numbers are the main numbers, and the last 6 numbers are additional numbers. The main series of caviar in the desktop market is labeled as "manufacturer code + capacity + speed, cache + interface type".

Principal number part

WD - XXXX - X - X
The first part "WD" is short for "Western Digital" and refers to the products of Western Digital Corporation.
The second part usually consists of 3 or 4 digits, indicating the capacity, and is measured in 100M. The logo is the same as Seagate's, with the 4-bit "1200" representing 120GB and the 3-bit "800" representing 80GB
The letters in the third part indicate speed and cache capacity. A indicates a caviar hard disk whose rotational speed is 5400 RPM/ min. "B" indicates a caviar hard disk whose speed is 7200 RPM/ min. E indicates the Protege series hard disks whose rotational speed is 5400 RPM/ min. "J" represents a high-end caviar hard disk with a speed of 7200 RPM/ min and a data cache of 8MB. "G" represents the most high-end desktop hard disk Raptor series with a speed of 10,000 RPM/ min and a data cache of 8MB.
The fourth part describes the interface types. A- Ultra ATA66, B- Ultra ATA100, W represents the hard disk used in the AV (digital video and audio) field, D represents the Serial ATA150 interface.

Additional numbered part

- X - X - XX XX
The first part is the OEM customer identification, 00 is the retail market, and the rest is the OEM customer code. If it is other characters, it is the OEM customer code, different numbers correspond to different OEM customers, and this number is usually not for the retail market.
The first character in the second part indicates the capacity of a single disk. C indicates that the capacity of a single disk is 40GB, D indicates 66GB, and E indicates 83GB. Corresponding to the single disk capacity, CP--Protg series (commonly referred to as EB series) 40GB single disk capacity version, CB--Caviar5400 series (AB series) 40GB single disk capacity version, CA--Caviar7200 series (BB series) 40GB single disk capacity version, CR- Caviar SE 7200 series (i.e. JB series with 8MB cache) 40GB single-disk capacity version.
The last character in the second part indicates the version code of the same series of hard disks, which changes with different series. "A" stands for 7200 RPM, BB series with Ultra ATA100 interface; "B" stands for 5400 RPM, Ultra ATA66 interface AB series; "P" stands for 5400 RPM, EB series with Ultra ATA100 interface; "R" stands for 7200 RPM, Ultra ATA100 interface, JB series with 8MB cache. In the single disc 66GB and 83GB products, there are also other letters such as "U", "V", corresponding to JB series and BB series products respectively.
The fourth part is the Firmware version of the hard disk. We commonly have "F0", "A0" and so on.