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8-inch floppy disk, inserted in drive, (3½-inch floppy diskette, in front, shown for scale) 3½-inch, high-density floppy diskettes with adhesive labels affixed The first commercial floppy disks, developed in the late 1960s, were 8 inches (203.2 mm) in diameter; [4] [5] they became commercially available in 1971 as a component of IBM products and both drives and disks were then sold ...
By 1988, the 3 + 1 ⁄ 2-inch was outselling the 5 + 1 ⁄ 4-inch. [69] In South Africa, the 3 + 1 ⁄ 2-inch format was generally called a stiffy disk, to distinguish it from the flexible 5 + 1 ⁄ 4-inch format. [70] [71] The term "3 + 1 ⁄ 2-inch" or "3.5-inch" disk is and was rounded from the 90 mm actual dimension of one side of the ...
Size Density Sides Tracks tpi bpi Sectoring Coercivity Unformatted capacity per side 2 inch Video Floppy: 52 256 >800 kB or 50 fields of analog video [1]: 2 inch LT-1: double 80 245 2 1 ⁄ 2 inch
A Maxell-branded 3-inch Compact Floppy Disk. The floppy disk is a data storage and transfer medium that was ubiquitous from the mid-1970s well into the 2000s. [1] Besides the 3½-inch and 5¼-inch formats used in IBM PC compatible systems, or the 8-inch format that preceded them, many proprietary floppy disk formats were developed, either using a different disk design or special layout and ...
SSDD originally referred to Single Sided, Double Density, a format of (usually 5 + 1 ⁄ 4-inch) floppy disks which could typically hold 35-40 tracks of nine 512-byte (or 18 256-byte) sectors each. Only one side of the disc was used, although some users did discover that punching additional holes into the disc jacket would allow the creation of ...
Disk II drives. The Disk II Floppy Disk Subsystem, often rendered as Disk ][, is a 5 + 1 ⁄ 4-inch floppy disk drive designed by Steve Wozniak at the recommendation of Mike Markkula, and manufactured by Apple Computer It went on sale in June 1978 at a retail price of US$495 for pre-order; it was later sold for $595 (equivalent to $2,780 in 2023) including the controller card (which can ...
The XF551 is a 5 1/4 inch floppy disk drive produced by Atari, Inc. for the Atari 8-bit computers. Introduced in 1987, it matches the gray design language of the XE models. It was the first drive from the company with official support for double-density and double-sided floppy disks—360 kB of storage per disk—and was also the final floppy ...
The best-known floppy disk drive for the C64, the 1541 is a single-sided 170-kilobyte drive for 5¼" disks. The 1541 directly followed the Commodore 1540 (meant for the VIC-20 ). The disk drive uses group coded recording (GCR) and contains a MOS Technology 6502 microprocessor, doubling as a disk controller and on-board disk operating system ...
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