Reference

Backup and recovery glossary

Part of the Backup and recovery glossary:

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archive
An archive is a collection of computer files that have been packaged together for backup, to transport to some other location, for saving away from the computer so that more hard disk storage can be made available, or for some other purpose.


backup
Backup is the activity of copying files or databases so that they will be preserved in case of equipment failure or other catastrophe.


backup storage
In computers, backup storage is storage that is intended as a copy of the storage that is actively in use so that, if the storage medium such as a hard disk fails and data is lost on that medium, it can be recovered from the copy.


cold backup
A cold backup, also called an offline backup, is a database backup when the database is offline and not accessible for updating.


CDP
Continuous data protection, also called continuous backup, is a storage system in which all the data in an enterprise is backed up whenever any change is made.


DAT USB drive
A DAT USB drive is a tape drive with digital audio tape (DAT) that can be plugged into a Universal Serial Bus (USB) connection as a simple and relatively low-cost way to back up data routinely, especially on servers.


disk-to-disk-to-tape
Disk-to-disk-to-tape (D2D2T) is an approach to computer storage backup and archiving in which data is initially copied to backup storage on a disk storage system and then periodically copied again to a tape storage system (or possibly to an optical storage system).


failover
Failover is a backup operational mode in which the functions of a system component (such as a processor, server, network, or database, for example) are assumed by secondary system components when the primary component becomes unavailable through either failure or scheduled down time.


hot backup
A hot backup, also called a dynamic backup, is a backup performed on data even though it is actively accessible to users and may currently be in a state of being updated.


iSCSI
Internet SCSI (Small Computer System Interface) is an Internet Protocol (IP)-based storage networking standard for linking data storage facilities developed by the Internet Engineering Task Force (IETF).


LTO
Linear Tape-Open (LTO) is an open-format tape storage technology developed by Hewlett-Packard (HP), International Business Machines (IBM), and Certance.


optical storage
Optical storage is any storage method in which data is written and read with a laser for archival or backup purposes.


RAID
Redundant array of independent disks; originally redundant array of inexpensive disks) is a way of storing the same data in different places (thus, redundantly) on multiple hard disks. By placing data on multiple disks, I/O operations can overlap in a balanced way, improving performance.


restore
In data management, restore is a process that involves copying backup files from secondary storage (tape, Zip disk or other backup media) to hard disk.


restore point
In recent Windows operating systems, a restore point is a saved "snapshot" of your computer's data at a specific time. By creating a restore point, you can save the state of the operating system and your own data so that if future changes cause a problem, you can restore the system and your data to the way it was before the changes were made.


Serial ATA
Serial Advanced Technology Attachment or SATA) is a new standard for connecting hard drives into computer systems. As its name implies, SATA is based on serial signaling technology, unlike current IDE (Integrated Drive Electronics) hard drives that use parallel signaling.


serverless backup
Serverless backup is a method of offloading backup procedures from a server so that the time ordinarily devoted to backup functions can be used to carry out other server tasks.


storage at the edge
Storage at the edge is an expression that refers to data storage and backup routines used in portable and mobile computing.


storage filer
A storage filer is a file server designed and programmed for high-volume data storage, backup, and archiving.


storage snapshot
A storage snapshot is a set of reference markers, or pointers, to data stored on a disk drive, on a tape, or in a storage area network (SAN).


tape backup
Tape backup is the ability to periodically copy the contents of all or a designated amount of data from its usual storage device to a tape cartridge device so that, in the event of a hard disk crash or comparable failure, the data will not be lost.


tape library
In data storage, a tape library is a collection of magnetic tape cartridges and tape drives.


virtual tape
Virtual tape is the use of a special storage device that manages less-frequently needed data so that it appears to be stored entirely on tape cartridges when some parts of it may actually be located in faster, hard disk storage.

This was last updated in August 2008
Posted by: Margaret Rouse

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