In computing and optical disc recording technologies, an optical disc (OD) is a flat, usually circular disc that encodes binary data in the form of pits and lands on a special material, often aluminum, on one of its flat surfaces. Its main uses are physical offline data distribution and long-term archival.Changes from pit to land or from land to pit correspond to a binary value of 1; …

IBM 1311 Disk Storage Drive is announced. Announced on October 11, 1962, the IBM 1311 was the first disk drive IBM made with a removable disk pack. Each pack weighed about ten pounds, held six disks, and had a capacity of 2 million characters. The disks rotated at 1,500 RPM and were accessed by a hydraulic actuator with one head per disk.

The DVD (common abbreviation for Digital Video Disc or Digital Versatile Disc) is a digital optical disc data storage format. It was invented and developed in 1995 and first released on November 1, 1996, in Japan. The medium can store any kind of digital data and has been widely used for video programs (watched using DVD players) or formerly for storing software and other …

The floppy disk (or a 3 1/2 floppy for today's standard) is a removable magnetic storage medium.Floppy disks are used for moving information between computers, laptops or other devices. Some early digital cameras, electronic music instruments and older computer game consoles use floppy disks.Floppy disks are inserted in to a floppy disk drive or simply floppy …

The compact disc (CD) is a digital optical disc data storage format that was co-developed by Philips and Sony to store and play digital audio recordings. In August 1982, the first compact disc was manufactured. It was then released in October 1982 and branded as Digital Audio Compact Disc.. The format was later adapted (as CD-ROM) for general-purpose data storage.

The memory cell is the fundamental building block of computer memory.The memory cell is an electronic circuit that stores one bit of binary information and it must be set to store a logic 1 (high voltage level) and reset to store a logic 0 (low voltage level). Its value is maintained/stored until it is changed by the set/reset process.

A rupture disk, also known as a pressure safety disc, burst disc, bursting disc, or burst diaphragm, is a non-reclosing pressure relief safety device that, in most uses, protects a pressure vessel, equipment or system from overpressurization or potentially damaging vacuum conditions.. A rupture disk is a type of sacrificial part because it has a one-time-use membrane that fails at a ...

SATA computer hard drives can transmit data at a speed of 150, 300 or 600MBps. SATA drives improve the overall speed of the PC, allowing apps and games to load faster. ... to meet the needs of large or complex servers. They use a redundant array of independent disks (RAID) to prevent data losses and downtime; If one of the drives fails while ...

Password requirements: 6 to 30 characters long; ASCII characters only (characters found on a standard US keyboard); must contain at least 4 different symbols;

The access time or response time of a rotating drive is a measure of the time it takes before the drive can actually transfer data.The factors that control this time on a rotating drive are mostly related to the mechanical nature of the rotating disks and moving heads.It is composed of a few independently measurable elements that are added together to get a single value when …