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When IBM started supplying 20 MB hard drives as standard for its newer PC-XT's, Leading Edge supplied a 30 meg hard drive standard. [7] They later released a Model D86 (an Intel 8086), Model D2 in 1988 with a 65 MB hard drive for $2495(US) and a 10 MHz processor (an Intel 80286) [8] and Model D3 (an Intel 80386).
Initially all external storage, tape and hard disk drives are today available as both internal and external storage. In the 1964 removable disk media was introduced by the IBM 2310 disk drive with its 2315 cartridge used in IBM 1800 and IBM 1130 computers. [ 7 ]
The first HDD [11] had an average seek time of about 600 ms. [12] and by the middle 1970s, HDDs were available with seek times of about 25 ms. [13]Some early PC drives used a stepper motor to move the heads, and as a result had seek times as slow as 80–120 ms, but this was quickly improved by voice coil type actuation in the 1980s, reducing seek times to around 20 ms.
Western Digital said that the new drives are 35 percent faster than the previous generation. On September 12, 2008, Western Digital shipped a 500 GB 2.5-inch (64 mm) notebook hard drive which is part of their Scorpio Blue series of notebook hard drives. On January 27, 2009, Western Digital shipped the first 2 TB internal hard disk drive. [26]
Western Digital WD740GD A Fujitsu laptop drive (80 GB, 7,200 RPM) on the left and a Western Digital VelociRaptor (300 GB, 10,000 RPM). The Western Digital Raptor (often marketed as WD Raptor, 2.5" models known as VelociRaptor) is a discontinued series of high performance hard disk drives produced by Western Digital first marketed in 2003.
As of January 2024, the largest hard drive is 32 TB (while SSDs can be much bigger at 100 TB, mainstream consumer SSDs cap at 8 TB). [7] Smaller, 2.5-inch drives, are available at up to 2 TB for laptops, and 6 TB as external drives.
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