backup

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backup

[′bak‚əp]
(building construction)
That part of a masonry wall behind the exterior facing.
(civil engineering)
Overflow in a drain or piping system, due to stoppage.
(computer science)
Logical or physical facilities to aid the process of restarting a computer system and recovering the information in it following a failure.
The provision of such facilities.
(engineering)
An item under development intended to perform the same general functions that another item also under development performs.
A compressible material used behind a sealant to reduce its depth and to support the sealant against sag or indentation.
(graphic arts)
An image printed on the reverse side of a printed sheet.
The printing of such an image.
(metallurgy)
A support used to balance the upsetting force in the workpieces during flash welding.
(petroleum engineering)
During drilling, the holding of one section of pipe while another is screwed out of it or into it.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

backup

1. That part of a masonry wall behind the exterior facing.
2. A compressible material used behind a sealant to reduce its depth and to support the sealant against sag or indentation.
3. Overflow in a drain or piping system, due to stoppage.
4. A condition where waste water flows back into another fixture or compartment or water line (but does not flow back into the potable water system).
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

backup

(operating system)
("back up" when used as a verb) A spare copy of a file, file system, or other resource for use in the event of failure or loss of the original.

The term commonly refers to a copy of the files on a computer's disks, made periodically and kept on magnetic tape or other removable medium (also called a "dump").

This essential precaution is neglected by most new computer users until the first time they experience a disk crash or accidentally delete the only copy of the file they have been working on for the last six months. Ideally the backup copies should be kept at a different site or in a fire safe since, though your hardware may be insured against fire, the data on it is almost certainly neither insured nor easily replaced.

See also backup software, differential backup, incremental backup, full backup. Compare archive, source code management.
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)

backup

(1) A copy of data and software on external storage. "Backup," one word, is the noun; to "back up," two words, is the verb. See backup software, backup types, backup storage, copy data, backup and restore, disaster recovery and LAN-free backup.

(2) Additional hardware resources ready to take over if the main system fails. See fault tolerant.
Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.
References in periodicals archive ?
A few years ago a unique random-access magnetic backup device no bigger than a 35-millimeter camera appeared on the scene.
NASA intends to use one of two strategies to keep the backup device working come September.
Although it is possible to do a complete file-based backup (that is, copying every file on your hard disk to a backup device), this strategy is flawed since Windows is not able to copy files currently in use by Windows or any other application.
According to the company, the backup device is aimed at small to medium servers as well as individual workstations.
* send data to the best backup device available--whether across the network or the local bus of the server while considering network speed and bandwidth requirements, the amount of time available for backups, and the availiability and capacity of the backup devices;
With version 14.5, users can create disaster recovery boot discs in a few clicks, restore single files from image backups and quickly configure a NAS with all security settings as standard backup device.
The user can easily change switch position, lockout front panel pushbutton control or obtain switch status via Telnet command interface or graphical user interface for critical switching to a backup device or network.
Storage is no longer tied to specific servers and data can be directed to any backup device on the SAN that has the appropriate capacity.
No changes are required to the current backup software environment, backup performance is improved compared to tape-based backup, and the D2D backup device often provides some level of rapid file restore or recovery compared to tape.