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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 Tandon Corporation was an American disk drive and PC manufacturer founded in 1975 (incorporated in 1976 as Tandon Magnetics Corp.) [1] by Sirjang Lal Tandon, a former mechanical engineer. [2] [3] The company originally produced magnetic recording read/write heads for the then-burgeoning floppy-drive market. Due to the labor-intensive nature ...
The format was standardized as EIA-741 and co-published as SFF-8501 for disk drives, with other SFF-85xx series standards covering related 5.25 inch devices (optical drives, etc.) [33] The Quantum Bigfoot HDD was the last to use it in the late 1990s, with "low-profile" (≈25 mm) and "ultra-low-profile" (≈20 mm) high versions.
Verbatim, a name we mostly come across when looking for blank DVDs, has announced its new line of InSight portable USB hard drives. The storage devices are diminutive (weighing less than 6 ounces ...
Wong, Poh-Kam (July 1999). "The Dynamics of the HDD Industry Development in Singapore" (PDF).Centre for Management of Innovation and Technopreneurship, National University of Singapore: The Information Storage Industry Center, Graduate School of International Relations and Pacific Studies, University of California.
Original CD-ROM drives could read data at about 150 kB/s, 1× constant angular velocity (CAV), [1] the same speed of compact disc players without buffering. As faster drives were released, the write speeds and read speeds for optical discs were multiplied by manufacturers, far exceeding the drive speeds originally released onto the market.
In a later revision, this number was bumped up to 16 sectors per track with 6-and-2 encoding. [1] The floppy drive controller board, the "Disk II interface," [2] was built with 8 chips, one of which is the PROM, containing tables for the encoder and decoder, the state machine, and some code.
Like most other Commodore disk drives, these drives utilize zone bit recording to maintain an average bit density across the entire disk. Formatted capacity is approximately 0.5 megabyte per side, or 1 megabyte (1,066,496 bytes) in 4166 blocks total. [4] [5] [7] The 8050 is a single-sided drive, whereas the 8250 and SFD-1001 are double-sided ...