disk


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Related to disk: disc

disk

1. The two-dimensional projection of the surface of a star or planet.
2. See Galaxy; galaxies.

Disk

A flat, circular, raised ornament, carved as a series of disks adjacent to each other.

disk

[disk]
Also spelled disc.
(astronomy)
A relatively thin layer of material distributed in the central plane of a spiral galaxy, in contrast to the nucleus or halo.
(biology)
Any of various rounded and flattened animal and plant structures.
(computer science)
A rotating circular plate having a magnetizable surface on which information may be stored as a pattern of polarized spots on concentric recording tracks. Also known as magnetic disk.
(engineering acoustics)
(mathematics)
The region in the plane consisting of all points with norm less than 1 (sometimes less than or equal to 1).

disk

(storage)
1. magnetic disk.

2. compact disc.

3. optical disk.

Note: the american spelling, "disk", is normal for most computer disks whereas "compact disc", having come to computers via the audio world, is correctly spelled with a "c", indeed, this spelling is part of the CD standard.

disk

A direct access storage device. See floppy disk, hard disk, magnetic disk, optical disc, CD-ROM and DVD.


Disk and Memory Work Together
On the disk, data are stored in sectors, which hold a chunk of data (typically 512 bytes) and are the smallest unit that can be read or written. Memory is broken up into squares like a checkerboard, each square holding one byte. The contents of any single byte or group of bytes can be calculated, compared and copied independently. That is how fields are put together to form records and broken apart when read back in.
References in periodicals archive ?
Systems emerging over the next two years will employ SAS disks for boot drives, local data storage, and external arrays of modest to large size.
The new data indicate that the disk, apparently made almost entirely of micrometer-size grains, lies at about the same distance from its star as Earth does from the sun.
Worse, since the data are stored sequentially on tape--and cannot be accessed randomly--a program stored on that medium cannot run directly from the tape; it first must be downloaded to a hard disk, which is a random-access medium.
Keynote dinner titled Disk -- the Past, the Present and the Future to be presented by Fred Moore, Futurist and Founder Horison Information Strategies.
There is also guarded concern that disk that is used as a backup target could represent a potential security breach within the network because of its reliance on standard interfaces, which are known to be penetrable to hackers, viruses, etc.
The team spent 2 years refining calculations to track what would happen to a protoplanetary disk over 1,000 years, more than any other simulation had considered.
Sometimes computer performance can be significantly improved by simply rearranging the way data are stored on the hard disk, a job that is performed by disk-optimizing utilities.
Or, RAID disks may be used for transporting all backup data to secondary sites, and once there, data can be offloaded to either tape or disk at those sites.
May, the thick disk is composed only of stars that are at least 10 billion years old.
Depending on the auditor's application, optical disk storage may offer certain advantages over microfilm or microfiche.
A disk array composed of no more than 8 hard disks with RAID 5 single parity capability appears to be highly reliable.
Both teams saw evidence within the disk of an additional warp, this one located much closer to the star.