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Inner view of a 1998 Seagate HDD that used the Parallel ATA interface 2.5-inch SATA drive on top of 3.5-inch SATA drive, showing close-up of (7-pin) data and (15-pin) power connectors Current hard drives connect to a computer over one of several bus types, including parallel ATA , Serial ATA , SCSI , Serial Attached SCSI (SAS), and Fibre Channel .
1980 – Seagate releases the first 5.25-inch hard drive, the ST-506; [36] it had a 5-megabyte capacity, weighed 5 pounds (2.3 kilograms), and cost US$1,500 [37] 1982 – HP 7935 404 megabyte, 7-platter hard drive for minicomputers, HP-IB bus, $27,000; 1983 – RO351/RO352 first 3 1 ⁄ 2 inch drive released with capacity of 10 megabytes [38]
Shortly thereafter in January 2006, Seagate Technology began shipping its first laptop sized 2.5-inch (64 mm) hard drive using perpendicular recording technology, the Seagate Momentus 5400.3. Seagate also announced at that time that the majority of its hard disk storage devices would utilize the new technology by the end of 2006.
8-, 5.25-, 3.5-, 2.5-, 1.8- and 1-inch HDDs, together with a ruler to show the length of platters and read-write heads A newer 2.5-inch (63.5 mm) 6,495 MB HDD compared to an older 5.25-inch full-height 110 MB HDD. IBM's first hard drive, the IBM 350, used a stack of fifty 24-inch platters and was of a size comparable to two large refrigerators.
In 1993, Seagate released the first Barracuda drive, with the ST11950. The drive had a capacity of 2.03 GB (1.69 GB formatted), was available with FAST SCSI-2 (N/ND models) or WIDE SCSI-2 (W/WD models) interface, and was the first hard drive ever to have a spindle speed of 7200-RPM.
Manufactured the first 2.5-inch HDDs: Priam: United States: 1978: 1991: HDD assets sold to Prima International: Peripheral Technology: United States: 1985: 1990: Dissolution [131] [132] Quantum: United States: 1980: 2000: HDD assets sold to Maxtor: Ricoh: Japan: 1985? Exited the HDD business [133] Rodime: Scotland: 1979: 1991: Exited the HDD ...
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