History of hard disk drives
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In 1953, IBM recognized the immediate application for what it termed a "Random Access File" having high capacity and rapid random access at a relatively low cost. After considering technologies such a
A partially disassembled IBM 350 (RAMAC)
Removable disk packs
Burroughs B-475 Disk Drive (circled)
Seagate 20 MB HDD and Western Digital Controller for PC
ST-506/ST-412
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The ST-506 and ST-412 were early hard disk drives introduced by Seagate in 1980 and 1981 respectively, that later became construed as hard disk drive interfaces: the ST-506 disk interface and the ST-4
History of hard disk drives
…standard form factors had been established for drives using nominally 8-inch media (e.g., Shugart SA1000) and nominally 5.25-inch media (e.g., Seagate ST-506). During the 1970s, captive production, dominated by IBM's production for its own use, remained the largest revenue channel for HDDs, though the relative…
Seagate ST506 5¼-inch HDD with cover removed
2.5" 6495 MB IDE drive next to a 5.25" full-height 111 MB MFM drive
Western Digital WD1006
Control connector