When it comes to hard drives, Western Digital is a household name. As the world's largest hard disk drive manufacturer in terms of market share, Western Digital has won the favor of many enterprises and individual users with its excellent technical strength and product performance. In 2011, after a number of antitrust investigations, Western Digital successfully acquired Hitachi, which was the third largest market share at the time, further consolidating its market position.
 
In the hard disk industry, Seagate and Western Digital are two supergiants. However, with the impact of the SSD industry, the two manufacturers have adopted different business strategies. Although Seagate has some SSD products, its HDDs continue to improve while maintaining their technological advantages. Western Digital, on the other hand, chose to transfer strategically in the case of slightly weaker technical strength, and made frequent moves in the SSD industry, acquiring SanDisk and continuously launching new products; HDD products are more conservative and slightly inferior in performance to Seagate.
 
Western Digital's product line is classified according to usage scenarios, with five series: blue disk, red disk, purple disk, black disk, and gold disk. In the past, Western Digital's proprietary green disk series focused on energy saving and low power consumption, but the user reputation was average, and it has now been discontinued.
 
Western Digital Blue Disk is positioned at the home level and is also the most well-known series of mechanical hard disks. The performance of the blue disk is relatively conservative, and the speed of the 2T-6T version is 5400RPM, but the price of the 2TB version is cheap, only 279 yuan, which is 100 yuan cheaper than the Seagate Barracuda hard disk of the same capacity. In addition, it is also recommended to buy a 1TB version with 7200RPM speed, which is priced at only 299 yuan.
 
Western Digital Blue Disk also has a 2.5-inch hard disk suitable for notebooks, with 500GB, 1T, and 2T capacities to choose from, but the 500GB version cache is too small, and the price of 269 yuan is only 30 yuan cheaper than the 1T version, and it is recommended to buy a 1TB or 2TB version.
 
For game users, Western Digital also has a corresponding black disk to choose from. Unlike Seagate's hybrid hard drives, Western Digital black drives are still mechanical hard drives, but their performance is superior, and the 2.5-inch hard drives also have a speed of 7200RPM, which is rare on hard drives of the same size. And compared with the 3-year warranty of the blue disk, the Western Digital black disk provides a 5-year warranty, which is more reliable after sales. The 2.5-inch black disk is more cost-effective, and the 1TB version costs 449 yuan, while the 3.5-inch black disk is relatively expensive, and the 1TB version costs 549 yuan.
 
Compared with home computers, network servers and monitoring systems have more stringent requirements for the operation of hard drives. Hard disks used in NAS or surveillance need to run 24*7 uninterruptedly, and better control over heat generation and power consumption. Western Digital Red Disk and Purple Drive correspond to network-level and monitor-level hard disks respectively, and it is recommended to purchase Western Digital Red Disk Pro, which supports up to 16 disks, which is the largest number of hard disks supported among the network-level hard disks on sale. And the failure rate of the red disk Pro is lower, and the 5-year warranty is more reliable.
 
Western Digital Purple Disk supports 64 cameras in parallel, with a maximum capacity of 10TB, which can save surveillance video data with confidence. The speed of the purple disk 5400RPM is weaker than that of the Seagate Cool Eagle series, but the price of the purple disk is also cheaper than that of the Seagate, and the price of the 10TB version is 2699 yuan, which is 600 yuan cheaper than the Seagate Cool Eagle with the same capacity.
 
For enterprise users, Western Digital has launched the Golden Disk series, with an average failure interval of 2 million hours, but the Golden Disk only has a version with SATA interface, and lacks a faster SAS interface version, so users with SAS hard disk needs to choose other brands. Jinpan supports a maximum capacity of 10T, and the price is 3499 yuan.