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A hard disk drive ( HDD ), hard disk, hard drive, or fixed disk[ a] is an electro-mechanical data storage device that stores and retrieves digital data using magnetic storage with one or more rigid rapidly rotating platters coated with magnetic material.
History of hard disk drives. Historical lowest retail price of computer memory and storage. 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. [ 1] After considering technologies such as wire matrices, rod arrays, drums, drum arrays ...
Shopee Pte. Ltd. is a Singaporean multinational technology company specialising in e-commerce. It is a subsidiary company of Sea Limited . It was launched in 2015 in Singapore , before its global expansion.
History of IBM magnetic disk drives. IBM manufactured magnetic disk storage devices from 1956 to 2003, when it sold its hard disk drive business to Hitachi. [ 1][ 2] Both the hard disk drive (HDD) and floppy disk drive (FDD) were invented by IBM and as such IBM's employees were responsible for many of the innovations in these products and their ...
5.75 in × 3.25 in × 8 in (146.1 mm × 82.55 mm × 203 mm). This smaller form factor, first used in an HDD by Seagate in 1980, was the same size as full-height 5⁄4 -inch-diameter (130 mm) FDD, 3.25-inches high. This is twice as high as "half height"; i.e., 1.63 in (41.4 mm). Most desktop models of drives for optical 120 mm disks (DVD, CD ...
On SCSI hard disk drives, the SCSI controller can directly control spin up and spin down of the drives. Some Parallel ATA (PATA) and Serial ATA (SATA) hard disk drives support power-up in standby (PUIS): each drive does not spin up until the controller or system BIOS issues a specific command to do so. This allows the system to be set up to ...
The ST506 HDD was the first 5.25 inch hard disk drive, introduced in 1980 [ 3 ] by Shugart Technology (now Seagate Technology ). It stored up to 5 megabytes after formatting (153 cylinders, 4 heads, 32 sectors/track, 256 bytes/sector) [ 4 ] and cost US$1,500 (equivalent to $5,547 in 2023). [ 5 ] The similar, 10-megabyte ST412 HDD was introduced ...
Shopee e-commerce grew 32.9%, and digital financial services grew 21%. While the digital entertainment division's revenue technically fell 17.8%, the division's bookings, which is a more accurate ...